Very creative Tom.
I'm not that familiar with Corvette IRS hardware. Which year did you source the center from. My unfamiliar memory seems to recall the Corvette center castings having a lot of additional bosses for attachment of or to different parts of the Corvette IRS cradle.
I like how clean you made the adapters for the the rear and front mounting points. Have you experienced any fluid leakage at the rear adapter? If you would share, I'd be interested in how you resolved the
oil seal between your fabricated adapter, the case and the rear cover?
Very nice job!
Ed