Originally Posted by pacecar620
Does anyone have any info on spring rates for a '78? My pace allegedly has the gymkhana setup (dealer installed supposedly) with Bilstein shocks all around. The fronts are not labeled but allegedly the 550 lb/in. The rear has the correct 7 leaf, but I can find no info on the rate for that spring. I'm considering a TRW composite for weight and ride improvement. OEM is 35 yrs old and a bit creaky.
Welcome to the Forum!
Below is a link to GM Archives Vehicle Information Kits specific to your year Corvette. It is a pdf document that contains MVMA (Motor Vehicle Manufacturers Association) and Chevrolet information to the dealer (salesmen).
Click on the link.
Scroll down the page to "Corvette" and click on "Show".
Find the year of interest (in your case "1978 Chevrolet Corvette") and click on that link.
Accept the GM usage agreement, and a pdf will download. Save the pdf for future reference.
Open the pdf.
In your specific case, MVMA Suspension information is on page 59 of the pdf (page 24 of the MVMA document).
Frame and suspension information is also found on pages 87-89 of the pdf.
The pdf contains a lot of other useful information, it is worth a scan.
Hope this helps.