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Re: Need help quick about rear leafspring ! (wilbur)
If you are talking about the bolts for the end hole of the rear spring, I use grade8 fine thread with Nylok nuts to adjust for the height I want. The length you start with depends on whether the spring is original 7 or 9 leaf. If not is it plastic or some other spring rate.
A better starting point would be - how long are your current bolts and how much do you want to change the height?
Re: Need help quick about rear leafspring ! (wilbur)
The correct "stock" bolts are about 6-1/4" long, and use a castle nut and cotter pin; the longer replacements that use the Nylok nut and give you ride height adjustment capability are about 8-1/2" long.
Re: Need help quick about rear leafspring ! (JohnZ)
John is right. I installed all new parts in the rear. I used a new 9 leaf spring. When I set the car down and drove it the butt end set up higher than I would like. The butt end tended to want to sway alot. The perfect setup is to keep the half shafts level or straight and not on an angle. I did as John stated, installed 2- 8 1/2 blts. with the nylon nuts. I had a hard time locating them locally at hardware and nut and bolt suppliers due to their dimenion round. I ordered mine through Vet Brakes. Hope that helps. :seeya
John is right. I installed all new parts in the rear. I used a new 9 leaf spring. When I set the car down and drove it the butt end set up higher than I would like. The butt end tended to want to sway alot. The perfect setup is to keep the half shafts level or straight and not on an angle. I did as John stated, installed 2- 8 1/2 blts. with the nylon nuts. I had a hard time locating them locally at hardware and nut and bolt suppliers due to their dimenion round. I ordered mine through Vet Brakes. Hope that helps.
If you don't mind send some pictures of your old 66 corvette. It sounds like you sold it a couple of years ago. I bought a 66 vette with a magnet red paint job about a year ago from Holly White.