Scott S. Posted September 16, 2021 Share Posted September 16, 2021 An 8.2 " differential doesn't have the two "block tabs" on the bottom of the carrier housing. 8.5"/8.6" do. Chevdiy.com has a good article on I.D.ing things. As for going to a 700r from a th400, PATC has a step by step procedure. It involves shortening the driveshaft, changing the input yoke, changing the cross member, plus all the linkage revisions. It'll give you better mileage, plus the overdrive on the highway will keep the rpm's down. Quote Link to comment Share on other sites More sharing options...
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