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From: SCMR Rat Pack'r Charter Member..Great Bend KS
You can get the dimensions from a C4 chassis.
I know you were looking for numbers or a weblink....something quick and easy....but you should be prepared to devote some real effort to this project, and you might as well start right now.
From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
I'm hoping you have success with the frame dimension info search.
I'm about 60% complete on my C4 suspension swap onto my spare '69 frame, but I've pretty much had to wing most of it. Finding dimensional information other than common alignment specs is almost non-existent.
I went to a frame straightening shop and asked the guys if I could make a copy of the '88 Corvette page and they let me. They even had a large format copy machine. Be friendly and tell what you want to use the info for and hope you find someone in a good mood. The detail on the car is great, it gives coordinates for all the suspension mounting and pickup points.