Gain extra benefits by becoming a Supporting Member Click here find out how!
Classic Performance Products Classic Parts
Ciadella InteriorsAmerican Auto Wire Classic Industries
Chevs of the 40sDanchuk Catalog
Hellwig Products IncPerformance Rod & CustomEcklers AutoMotive
Nu-Relics Power Windows
Impala Bob's Bob's Chevy Trucks Bob's Chevelle Parts Bob's Classic Chevy



Username Post: 66 4 Speed Hump Placement        (Topic#349580)
65acadian 
Member
Posts: 158
65acadian
Loc: Manitoba, Canada
Reg: 08-15-04
02-09-18 04:59 PM - Post#2723906    

I am doing a 4 speed conversion on a 66. I'm not new to doing this, I did the identical conversion a few years ago, so I'm aware of all the parts needed etc. One thing I don't have though is anything that tells me about locating the hump correctly. Last time I did it, the floor in the car already had a hole in it for the auto console shifter. This time it's a column shift car so I start from scratch and I'm doing a very original 40,000 mile car. I want to get it right and do a nice job. Does anyone have measurements and pictures of correctly placing the floor hump?

I checked in the archives here and the resource section but I can't find anything about that exact question.

Thanks.



 
This Forum is Sponsored by
1-800-IMPALAS  *  www.impalas.com
Visit Impala Bob's forum on ChevyTalk
65acadian 
Member
Posts: 158
65acadian
Loc: Manitoba, Canada
Reg: 08-15-04
02-09-18 05:07 PM - Post#2723908    
    In response to 65acadian

I found some help in an old post of mine from 6 years ago when I asked a similar question!

But if anyone has pictures of a bare 4 speed floor and some dimensions it would still be a big help.



 
Texasray 
"2nd Year" Silver Supporting Member
Posts: 60
Texasray
Loc: Texas
Reg: 11-01-16
02-10-18 04:33 AM - Post#2723928    
    In response to 65acadian

I found this while searching the net for custom consoles.

http://www.chevytalk.org/fusionbb/showtopic.php?ti...

Sam



 
65acadian 
Member
Posts: 158
65acadian
Loc: Manitoba, Canada
Reg: 08-15-04
02-10-18 08:41 PM - Post#2724002    
    In response to Texasray

Thank you, I did find that thread eventually. I worked on it today and that makes total sense. The specs given---

"Opening is 4-1/2" wide and 6" front to rear. The rear of the opening is 2-1/2" foward of the second sill plate screws. The top edge of the opening is 1" off center to the drivers side.
I took these measurements from my original 4-speed 66 Impala."

So that is what I did today. I didn't cut a hole yet though. I have a borrowed original hump that I used to mark it. Now I am waiting for my repro hump to arrive (and I hear it won't fit as well, but at least I know where it has to be located now and I can make it fit.)





Edited by 65acadian on 02-10-18 08:42 PM. Reason for edit: No reason given.

 
aghaga 
"4th Year" Silver Supporting Member
Posts: 2137
aghaga
Age: 63
Loc: Altavista, Va.
Reg: 07-05-08
02-11-18 08:38 AM - Post#2724021    
    In response to 65acadian

Leave plenty of metal for overlap. Every factory floor cut under the hump that I have seen looked like it was crudely cut with a torch of some sort.



 
astrojet427 
Member
Posts: 141
astrojet427
Loc: Vancouver, B.C.
Reg: 11-22-05
02-11-18 11:07 AM - Post#2724047    
    In response to aghaga

Just curious. Two things, can someone advise: is the style of hump (shape/design) the same for both console and non-console applications, and is the floor location the same for console and non-console applications?

1967 Impala SS. 327-Turbo 400; 12 bolt-3.55 gears. A few photos of my '67.

1972 Corvette Convertible Mille Miglia Red 4 speed.

1963 Cadillac Eldo-Triple Black.


 
aghaga 
"4th Year" Silver Supporting Member
Posts: 2137
aghaga
Age: 63
Loc: Altavista, Va.
Reg: 07-05-08
02-11-18 12:33 PM - Post#2724065    
    In response to astrojet427

same




 
65acadian 
Member
Posts: 158
65acadian
Loc: Manitoba, Canada
Reg: 08-15-04
02-11-18 04:40 PM - Post#2724101    
    In response to aghaga

Yes, they didn't do a nice job cutting them. Chevelle and Nova are the same way.



 
65acadian 
Member
Posts: 158
65acadian
Loc: Manitoba, Canada
Reg: 08-15-04
02-11-18 04:47 PM - Post#2724103    
    In response to 65acadian

https://photos.google.com/photo/AF1QipMfgg1jaSm eai...



 
65acadian 
Member
Posts: 158
65acadian
Loc: Manitoba, Canada
Reg: 08-15-04
02-11-18 04:48 PM - Post#2724104    
    In response to 65acadian

https://photos.google.com/photo/AF1QipNv1pS-vfQ vD-...



 
65acadian 
Member
Posts: 158
65acadian
Loc: Manitoba, Canada
Reg: 08-15-04
03-09-18 06:26 PM - Post#2727058    
    In response to 65acadian

I got my repro hump from the Parts Place today. I'm glad I was warned. Wow, what a piece of crap. I spent 2 solid hours bending and shaping it to make it fit. Luckily a friend loaned me an original hump so I could see how it should look and where it should sit.

I can't believe they get away with selling that piece of junk. It's not even close to the right contour to fit the floor and I'll likely have to weld the opening shut and then cut it the right size in the right place on the hump. They cut it too big, in the wrong spot and it's just hacked, I can't believe it.



 
66cayne 
Valued Contributor
Posts: 2732

Reg: 08-06-08
03-10-18 08:21 AM - Post#2727103    
    In response to 65acadian

Yeah, join the club. I did the same thing. Hammering and shaping that repro 'pos' hump. After an hour or so it finally fit and I screwed it down. I did not cut my floor until I had the hump properly positioned so I could use it as a template.



 
65acadian 
Member
Posts: 158
65acadian
Loc: Manitoba, Canada
Reg: 08-15-04
03-10-18 09:27 AM - Post#2727110    
    In response to 66cayne

Same here, I still haven't cut the floor. I'll find the shifter location first from the underside and then figure it out from there.

I can't get over how that thing barely resembles the correct part. Awful.



 
65acadian 
Member
Posts: 158
65acadian
Loc: Manitoba, Canada
Reg: 08-15-04
03-10-18 09:29 AM - Post#2727111    
    In response to 65acadian

I have a question for you guys with bench seat factory 4 speed cars. Does the boot sit in it's natural (as in sitting on the shelf) position in neutral or in 4th gear?

What I mean is, is the natural shape with the shifter pulled back into 4th, or when it's sitting in neutral. For locating the hump and boot in the correct spot on the floor, it would help to know that because it would change the position slightly.



 
bigbowtielover 
Valued Contributor
Posts: 2511
bigbowtielover
Loc: Surrey British Columbia
Reg: 09-01-13
03-11-18 08:22 PM - Post#2727247    
    In response to 65acadian

The hump only goes in one spot. If you had a factory one it literally falls into place. The hole from factory is torch cut and is about an inch smaller than the od of the hump. Big hole is for linkage clearance. Make it too small and linkage can hit floor or make it very difficult to make adjustments to linkage rods. And with the hole too small it becomes a dirt collector. Lol.



 
astrojet427 
Member
Posts: 141
astrojet427
Loc: Vancouver, B.C.
Reg: 11-22-05
03-11-18 09:50 PM - Post#2727263    
    In response to bigbowtielover

Someone a few years ago was reproducing the 66/67 humps that was a near match to the original. I made a mistake and did not buy one at the time.

Person was in the hobby, so the hump was not sold by the big vendors. Low volume. Hopefully he can repop some more.

1967 Impala SS. 327-Turbo 400; 12 bolt-3.55 gears. A few photos of my '67.

1972 Corvette Convertible Mille Miglia Red 4 speed.

1963 Cadillac Eldo-Triple Black.


 
65acadian 
Member
Posts: 158
65acadian
Loc: Manitoba, Canada
Reg: 08-15-04
03-11-18 10:49 PM - Post#2727268    
    In response to astrojet427

  • astrojet427 Said:
Someone a few years ago was reproducing the 66/67 humps that was a near match to the original. I made a mistake and did not buy one at the time.

Person was in the hobby, so the hump was not sold by the big vendors. Low volume. Hopefully he can repop some more.




Yes, I think that was Jon who also did the repro bench seat shifter boot. I have a picture of the hump he made vs. an orginal and it looks nice.

I am told he's not making any more, it was too much work for what he could get for them. I think he sold them in the range of $175 US?



 
65acadian 
Member
Posts: 158
65acadian
Loc: Manitoba, Canada
Reg: 08-15-04
03-11-18 10:52 PM - Post#2727269    
    In response to bigbowtielover

  • bigbowtielover Said:
The hump only goes in one spot. If you had a factory one it literally falls into place. The hole from factory is torch cut and is about an inch smaller than the od of the hump. Big hole is for linkage clearance. Make it too small and linkage can hit floor or make it very difficult to make adjustments to linkage rods. And with the hole too small it becomes a dirt collector. Lol.



I have a borrowed original hump here but there seems to still be a bit of variation in where it fits nice, maybe 1/2". Anyway, I am sure I found the right spot because I have an original boot and shifter. Once I did that, I got the repro hump to fit the same spot and all is good. Lots of time to get it right though, it took patience.




 
66cayne 
Valued Contributor
Posts: 2732

Reg: 08-06-08
03-12-18 06:31 AM - Post#2727295    
    In response to 65acadian

Install your bellhousing, trans and shifter body. Put the shifter in neutral. Mark the floor directly above where the shifter is now pointing. Drop the trans down and drill a 1/2" hole from the bottom at the mark you made. From inside the car, place the shifter hump and center the hump opening over the hole you drilled. It will now be properly positioned.



 
65acadian 
Member
Posts: 158
65acadian
Loc: Manitoba, Canada
Reg: 08-15-04
03-12-18 10:39 PM - Post#2727410    
    In response to 66cayne

I had the Muncie on the floor, installed the shifter and rods, put it in neutral and took all sorts of measurements to determine where it came through the floor. Cut a small enough hole to let it come through. Once I did that I put the hump on, the the boot and retainer on and voila, it all made sense! Traced the hump, cut the hole about 1" smaller than the hump and it's all good. I just have to find some good sealer now for the hump to floor and screw it down.



 
astrojet427 
Member
Posts: 141
astrojet427
Loc: Vancouver, B.C.
Reg: 11-22-05
03-12-18 10:53 PM - Post#2727412    
    In response to 65acadian

  • 65acadian Said:
  • bigbowtielover Said:
The hump only goes in one spot. If you had a factory one it literally falls into place. The hole from factory is torch cut and is about an inch smaller than the od of the hump. Big hole is for linkage clearance. Make it too small and linkage can hit floor or make it very difficult to make adjustments to linkage rods. And with the hole too small it becomes a dirt collector. Lol.



I have a borrowed original hump here but there seems to still be a bit of variation in where it fits nice, maybe 1/2". Anyway, I am sure I found the right spot because I have an original boot and shifter. Once I did that, I got the repro hump to fit the same spot and all is good. Lots of time to get it right though, it took patience.




Acadian, is your 4 speed conversion going to be used without a console? Seems like that repo hump from the pics I've seen is not flat on top to accept the boot and seal up to the console.

Would be nice to get the dimensions or photos to scale of that original hump. Wonder if a 3D printer would work to create one. Hmmm.

1967 Impala SS. 327-Turbo 400; 12 bolt-3.55 gears. A few photos of my '67.

1972 Corvette Convertible Mille Miglia Red 4 speed.

1963 Cadillac Eldo-Triple Black.


 
65acadian 
Member
Posts: 158
65acadian
Loc: Manitoba, Canada
Reg: 08-15-04
03-13-18 10:10 PM - Post#2727528    
    In response to astrojet427

Correct, no console. This is in a 66 Strato Chief 2 door post bench seat. I see you are from BC so you know the floor pan, powertrain etc is the same as a 66 Biscayne.

However, I've also had a 66 Grande Parisienne factory 4 speed with a console. The hump is the same but there's a lower and upper boot that do the sealing for the shifter rather than the original boot I'm using now for the bench seat.

Bottom line is, if you buy the repro hump, beware. It takes some MAJOR renovations to make it fit the floor pan contour.





 
This Forum is Sponsored by
1-800-IMPALAS  *  www.impalas.com
Visit Impala Bob's forum on ChevyTalk
Icon Legend Permissions Topic Options
Report Post

Quote Post

Quick Reply

Print Topic

Email Topic

785 Views
FusionBB
FusionBB™ Version 2.1
©2003-2006 InteractivePHP, Inc.
Execution time: 0.388 seconds.   Total Queries: 13   Zlib Compression is on.
All times are (GMT -0800) Pacific. Current time is 06:41 PM
Top