Everyday Performance LLC has produced a limited number of replacement spring perches for the 8.5" 10 bolt Buick rear. Lots of the originals are slowly rotting to death. If yours is in bad shape, weld on one of our replacements. Laser cut and Zinc chromated $25 each while supplies last! (shipping additional) shoot me a pm here (TechG8) or text/call 860-218-5780 or email ken@everyday-performance.com