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Username Post: Distributor mounting location...        (Topic#363912)
PeteVS 
Newbie
Posts: 12
PeteVS
Loc: 07932
Reg: 01-28-17
01-08-21 11:39 AM - Post#2811653    

I'm working on putting a SBC into a non-Chevy car and the center line of the distributor winds up being just about dead smack lined up with the firewall. My plan is to do some surgery on the firewall creating a "channel" not only big enough for the "window" cap if the engine rocks to the right when power is applied but also to allow the distributor without the cap to be extracted from the engine. It comes up at an angle towards the left. I have a nice 6" diameter cylinder which I've sliced in half but there isn't a whole lot of room to allow the engine to rock slightly towards the passenger side and allow the distributor to slide up the channel. I've made some eyeball measurements with a scale which shows the centerline of the distributor to be about 1" to the right of the engine centerline and it's canted about 5ยบ to the left. Does anyone have a drawing or better measurements for the centerline offset and the angle it sits at? Thanks in advance for any help you might be able to lend.



 


japete92 
"7th Year" Silver Supporting Member
Posts: 1624
japete92
Loc: No. Virginia
Reg: 01-18-13
01-08-21 12:18 PM - Post#2811657    
    In response to PeteVS

Current distributors for the sbc come in both 'large' and 'small' cap configurations. The 'large' cap (the one with the integral coil) is 5 1/2" in diameter. The 'small' cap (separate coil, OEM style; points or 'points-less') is 4 1/2" in diameter. They both install into the same location on the intake manifold. Measuring from the center of that 'hole' should ID ''space' needed for the distributor being used.

If installed correctly, the 'window' for the dwell adjustment (small cap point system distributors) should kinda 'face' away from the firewall. It should NOT interfere with the firewall. Also, draw an arrow from the center of the distributor, through the number 1 cylinder plug wire connector on the cap, and it basically points to the number 1 cylinder on the block. The initial timing setting dictates the exact orientation of the distributor.

The above is for the 'regular' sbc V8. One that looks like the attached. I never messed with a LS 'new' one. It may be different.

Does any of that help?

Pete






Attachment: v8_plug_wires.pdf (175.59 KB) 21 View(s)



Edited by japete92 on 01-08-21 12:27 PM. Reason for edit: No reason given.

 
PeteVS 
Newbie
Posts: 12
PeteVS
Loc: 07932
Reg: 01-28-17
01-08-21 03:15 PM - Post#2811666    
    In response to japete92

Doesn't really help. I'm settled on the distributor I'm using which is window cap, cluster points. I have good dimensions I've taken from it. I'm just not sure exactly where it is when it's mounted and being removed from the engine. I was hoping that someone had a GM drawing of the block machining that I could use for precisely placing the cut out in my firewall. Thanks!



 
gcrkfrd 
"3rd Year" Silver Supporting Member
Posts: 247
gcrkfrd
Age: 74
Loc: Neosho, MO.
Reg: 04-01-18
01-08-21 05:53 PM - Post#2811679    
    In response to PeteVS

A small block pontiac 315 dist. same, but shorter. Because they stuffed their motors back in the firewall

They asked me, why a Four door, and a Six, and I told them, JUST BECAUSE.


 
acardon 
Ultra Senior Member
Posts: 11472

Loc: DFW TEXAS
Reg: 03-25-05
01-09-21 09:51 AM - Post#2811717    
    In response to PeteVS

  • Quote:
I have a nice 6" diameter cylinder which I've sliced in half but there isn't a whole lot of room to allow the engine to rock slightly towards the passenger side and allow the distributor to slide up the channel.



To me, a 6" cylinder at an angle on the firewall would look odd. I would use less than half of a larger cylinder, so there is plenty of room on both sides to remove and adjust the distributor.
I'm going to have the same problem with a 1941 Dodge on a 1956 Chevy frame. Link to picture.
https://www.trifive.com/cdn-cgi/image/format= auto,...

Don
66 Corvair (driving)
57 2dr HT (driving)
56 2dr HT (waiting to be restored)


 
rod 
Member #248 Senior Member
Posts: 1739

Loc: kingman,az
Reg: 04-29-00
01-12-21 03:27 PM - Post#2811939    
    In response to acardon

this is Tuesday 12 Jan. tomorrow I will post the angle. I have it.
Rod in AZ



 
rod 
Member #248 Senior Member
Posts: 1739

Loc: kingman,az
Reg: 04-29-00
01-19-21 01:45 PM - Post#2812412    
    In response to rod

better late than never, right.
according to my blue print, the Dist sets 4 degrees off. viewed from the bell housing end, the top of the dist. would lean towards your left.
Rod in AZ



 


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