IRS swap to SRA

Consider starting first with a search at car-part.com. Search for a rear end from a 1999-2004 model year Mustang GT.

Knowing what I know now I would never put a salvage yard rear end into a new car without re-building it first on the bench. It's sooooooo much easier to rebuild a rear end when it's out of the car setting on axle stands.
 
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