WilliamN

I pulled out the springs in the car and wondering if these are stock I don't believe so, because I think the ones I pulled out a progressive springs. Every thing else is stock on the car except for the original 350 that was modified. I was looking for new progressive springs and the only thing I could find are these springs from ZIP corvette.
68-74 327 & 350 Front Coil Springs (Correct)
https://www.zip-corvette.com/68-74-3...s-correct.html
They say they are GM reproduction, but they look like progressive springs. So did they come from the factory as progressive?
Also do you recommend using these springs?
They also have these
68-74 427 & 454 Front Coil Springs (Correct)
https://www.zip-corvette.com/68-74-4...s-correct.html
They have a higher spring rate then the one for the 350 and they look like progressive springs.
Would you recommend the high spring rate then the other?
Thanks,
William

Kid Vette

Stock springs are progressive.

Gordonm

Yes those look like the stock springs. I have pulled out many and they all look like those