Gain extra benefits by becoming a Supporting Member Click here find out how!

Classic Performance Products Nu-Relics Power Windows
American Auto Wire Hellwig Products IncPerformance Rod & Custom
Danchuk Catalog



Username Post: 84 K10 "Heavy half..." questions        (Topic#366602)
CJ_in_NH 
Gold Supporting Member
Posts: 4
CJ_in_NH
Reg: 10-05-21
10-05-21 05:53 PM - Post#2828582    

Just purchased an 84 K10 with 64,000 miles on it. I'm not up to speed on all the models, but I was told the truck was a heavy half when I bought it- has dual front shocks... checking the VIN, its not listed as a heavy half. The truck has a plow attached which looks like it has been on the truck since new. I'm removing the plow, having the truck engine gone through and will start the semi-frame off resto. Just curious if I was duped on the heavy half jargon. Not that I care, just happy to have a project to occupy me for a bit.

It has a stock 305 I'm hoping has issues to justify an upgrade... It's a custom deluxe so bare bones pretty much, except has rally wheels and exterior trim package. Inside is simple which I like, not upgrading to carpet or power windows. The auto shifter is very loose, it falls out of park if you breath on it wrong, so need to address that as well.

Where shoudl I start?


Attachment: IMG_4465.jpg (2.99 MB) 5 View(s)






Edited by CJ_in_NH on 10-07-21 06:42 PM. Reason for edit: No reason given.

 
gchemist 
Member #271 Senior Chevytalk Moderator
Posts: 25561
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
10-06-21 12:07 PM - Post#2828633    
    In response to CJ_in_NH

Welcome to the site. For information on various models go here: http://www.73-87.com/

Heavy Halfs have stickers on the bed side. Check the glove box RPO label. Does it have extra rear leaf springs? What size width are the front rotors? They should be 1.25" vs 1.0" on a regular truck. Rear brakes are larger too.

The shifter pivot pin is probably worn out or loose. It can be replaced.

It's a low miles survivor. Doing a compression check will tell it's condition. Any large variation would indicate it's worn. It has probably not had many oil changes.

'83 Silverardo XST - ZZ4 powered
'95 Jimmy SLT (Bought @131,814)
'96 GMC Jimmy LS Ret. @236651 miles
'08 GMC Acadia 3.6L SLE


 
Keith Seymore 
Contributor
Posts: 752
Keith Seymore
Loc: Southeast Michigan
Reg: 09-17-08
10-08-21 11:13 AM - Post#2828801    
    In response to CJ_in_NH

  • CJ_in_NH Said:
Just purchased an 84 K10 with 64,000 miles on it. I'm not up to speed on all the models, but I was told the truck was a heavy half when I bought it- has dual front shocks... checking the VIN, its not listed as a heavy half. The truck has a plow attached which looks like it has been on the truck since new. I'm removing the plow, having the truck engine gone through and will start the semi-frame off resto. Just curious if I was duped on the heavy half jargon. Not that I care, just happy to have a project to occupy me for a bit.

It has a stock 305 I'm hoping has issues to justify an upgrade... It's a custom deluxe so bare bones pretty much, except has rally wheels and exterior trim package. Inside is simple which I like, not upgrading to carpet or power windows. The auto shifter is very loose, it falls out of park if you breath on it wrong, so need to address that as well.

Where shoudl I start?




Welcome -

Without checking, I believe the last year for "Heavy Half" was 1980 or 1981, and they were limited to C10 models only.

How did you check the VIN? "Heavy Half" would not be coded in the VIN itself in any way.

You can, depending on how desperate you are, send $50 and your VIN to the GM Heritage Center archive and they call pull the original invoice for you. This will include the build date, RPO content and pricing, and the name of the original selling dealership.

Dual Front Shocks, RPO Z75, is a standalone RPO and could be added to any K10 or K20 regardless of other option content.

https://www.gmheritagecenter.com/docs/gm-heritage-...

Chevelle Intro: http://www.popularhotrodding.com/features/1005phr_...
My Pontiacs: http://forums.maxperformanceinc.com/forums/showthr...
Pickup: http://67-72chevytrucks.com/vboard/showthread.php?...


Edited by Keith Seymore on 10-08-21 11:25 AM. Reason for edit: No reason given.

 
Keith Seymore 
Contributor
Posts: 752
Keith Seymore
Loc: Southeast Michigan
Reg: 09-17-08
10-08-21 11:24 AM - Post#2828802    
    In response to Keith Seymore

delete


Chevelle Intro: http://www.popularhotrodding.com/features/1005phr_...
My Pontiacs: http://forums.maxperformanceinc.com/forums/showthr...
Pickup: http://67-72chevytrucks.com/vboard/showthread.php?...


Edited by Keith Seymore on 10-08-21 11:24 AM. Reason for edit: No reason given.

 
CJ_in_NH 
Gold Supporting Member
Posts: 4
CJ_in_NH
Reg: 10-05-21
10-08-21 01:50 PM - Post#2828809    
    In response to Keith Seymore

I was going by the attached link I had found
http://chuckschevytruckpa ges.com/81-87VIN.html

The first paragragh under the diagram ends with the "heavy half" big 10 note... it was the only place I found this info. Being a random site on the inter webs, it of course could be bad info.

Being a newbie getting into chevy trucks, I may have been taken for a ride with the heavy half terminology. It wasn't what sold me on the truck, was just an interesting tidbit the guy selling had noted. I just wanted a repairable early 80's Chevy to tinker with.



 
gchemist 
Member #271 Senior Chevytalk Moderator
Posts: 25561
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
10-11-21 07:52 AM - Post#2828961    
    In response to CJ_in_NH

Looks like a nice survivor. Did you find an RPO sticker? The codes will state the options on it. Brakes and rear end gearing are good to know.

'83 Silverardo XST - ZZ4 powered
'95 Jimmy SLT (Bought @131,814)
'96 GMC Jimmy LS Ret. @236651 miles
'08 GMC Acadia 3.6L SLE


 
CJ_in_NH 
Gold Supporting Member
Posts: 4
CJ_in_NH
Reg: 10-05-21
10-13-21 02:55 PM - Post#2829105    
    In response to gchemist

No RPO, just towing info int eh glove box with the VIN.

I don't see any codes

It's Canadian I see. I believe it has the 700R trans, has overdrive.

Looks much happier with the plow mount off- original frame paint under it-

She seems to purr better with it gone, like she knows she's going to have a better life.

I did a VIN check, it only had 5,500 miles on it the first 10 years of it's life according to state records, was'nt registered for the first 10 years of the 2000's.

I need to pull the wheels off to check the brakes...and change the shocks.

I'm thinking I might replace the springs all the way around, I'm not doing a lift. I wan't it stock height, I'll just get slightly larger tires at some point.



 
CJ_in_NH 
Gold Supporting Member
Posts: 4
CJ_in_NH
Reg: 10-05-21
10-13-21 03:13 PM - Post#2829106    
    In response to CJ_in_NH

I'm trying to figure out how to start.

I found a local mechanic to go through the engine and hopefully bore it out to 350(if no cracks), new cam, all the bells and whistles, new intake, headers, blah blah.

Have the trans reworked.

I want to pull the front clip and bed - go over the frame and repaint. Redo the patch job rocker work, replace driver floor pan, replace rubber floor mat, with new rubber, replace dash. Get a new passenger door (has a huge dent). Fix minor rust at rear wheel wells (very minor), fix small hole in bed.

replace window gaskets all around.

Repaint it all.

But where to start...



 
gchemist 
Member #271 Senior Chevytalk Moderator
Posts: 25561
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
10-14-21 04:03 AM - Post#2829131    
    In response to CJ_in_NH

Start with the drivetrain. I did. Make it start and run. Everything else is cosmetics! I know! 20 years and still working on mine. Mechanical stuff keeps breaking. Once it's all fixed, then cosmetics are added. Order or download a catalogue from www.lmctruck.com. You'll find detailed diagrams of parts and break down of sections. Go through fluids and seals first. Check the costs of fixing the old 305 vs a crate 350. All the 305 accessories bolt on to a 350. Torque is key to driving the truck down the road.

'83 Silverardo XST - ZZ4 powered
'95 Jimmy SLT (Bought @131,814)
'96 GMC Jimmy LS Ret. @236651 miles
'08 GMC Acadia 3.6L SLE


 
Icon Legend Permissions Topic Options
Report Post

Quote Post

Quick Reply

Print Topic

Email Topic

181 Views
FusionBB
FusionBB™ Version 2.1
©2003-2006 InteractivePHP, Inc.
Execution time: 0.117 seconds.   Total Queries: 18   Zlib Compression is on.
All times are (GMT -0800) Pacific. Current time is 02:20 AM
Top