There’s plenty of rear axles that you can stuff under your Turbo Buick besides the OEM stock 10 bolt rear end.
Sure, most non-factory units will require some mods (shortening, brake mods, spring perches, etc.), but you will need to know how to identify what that new rear diff you’re looking at, actually is, especially if it isn’t in the donor car any longer.
This chart will show you what the rear cover looks like to assist in you ID’ing what exactly that rear axle is.
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