Nearly 30 years of obsessively cataloging, photographing, and taking video of each part means it will fit your 1970 Buick Skylark 8.5" GM Extra HD Standard Open Case [Uses Larger Bearings] - Rear Differential Differential Cases and Spiders.

Period. No Hassle. GUARANTEED.

We cover round trip shipping if we make a mistake.

Check out the video below to view the Guaranteed Exact Fit process from start to finish!