Most repro's make your Corvette sit to high, (seen that to many times) and I know you have too. Or make noise on hard bumps because their round at both ends.
All Original C1's will be flat at the top end that goes in the upper A arm ,they also having the part number embossed in at the flat end.
All Original C1's will be flat at the top end that goes in the upper A arm ,they also having the part number embossed in at the flat end.