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73-87 Chevy _ GMC Trucks => Brakes, Frame, Steering & Suspension => Topic started by: big_al273 on April 24, 2022, 03:04:03 pm

Title: looking for Chassis stretch/upfitting information
Post by: big_al273 on April 24, 2022, 03:04:03 pm: I'm thinking about stretching one of my 1 ton C&C frames to mount a dry van box and I'm looking for the OEM frame stretching and modifying manuals and/or procedures that would have been available to upfitters when these trucks were new.

The truck in question is a 1989 GMC R3500 C&C although I do plan to swap the cab, motor, ect to my 1986 K30 C&C chassis to save the 4x4 conversion.
Title: Re: looking for Chassis stretch/upfitting information
Post by: big_al273 on April 28, 2022, 04:46:43 pm: Bump
Title: Re: looking for Chassis stretch/upfitting information
Post by: VileZambonie on April 28, 2022, 06:46:12 pm: I think the best you'll find is the wheel base specs unless someone has documented it somewhere. https://www.gmheritagecenter.com/docs/gm-heritage-archive/vehicle-information-kits/Chevrolet-Trucks/1986-Chevrolet-Truck.pdf
Title: Re: looking for Chassis stretch/upfitting information
Post by: big_al273 on April 29, 2022, 11:51:19 am: Still haven't found what I'm after but I found out the title of the GM book it should be in: Chassis Layout and Body Builder's Instruction Drawings, 1988 Light and Medium Duty models

Anyone still have one?
Title: Re: looking for Chassis stretch/upfitting information
Post by: VileZambonie on April 29, 2022, 07:21:40 pm: Did you try contacting them for archived materials? https://www.gmupfitter.com/body-builder-manuals/

Quick google search showed a bunch of those manuals floating around.
Title: Re: looking for Chassis stretch/upfitting information
Post by: big_al273 on April 29, 2022, 10:33:11 pm: According to a post from someone else looking for one of these books he contacted them and they don't have stuff that old.
https://www.dieselplace.com/threads/looking-for-chassis-layout-book-1988.989293/
I haven't had ton of success with google on this, lots of chassis layout books for other models but I've only found a 1991 and 1990 Chassis layout book that might cover what I'm after. I will be making a phone call on Monday to ask about the 1990 chassis book and if it covers R/V series trucks and wheelbase modification as I am unable to send a message about it
Title: Re: looking for Chassis stretch/upfitting information
Post by: VileZambonie on April 30, 2022, 05:27:15 am: Here's a post where someone scanned some of the pages it looks like https://www.s10forum.com/threads/iso-1st-gen-s10-frame-body-mount-measurements.846057/
Title: Re: looking for Chassis stretch/upfitting information
Post by: Mike81K10 on April 30, 2022, 07:05:49 pm: I saw on EBay: Chassis Layout and Body Builder's Instruction Drawings, Light and Medium Duty models. Do a search!