What's good people. '87 Trans Am with the WS6 package. 305

TPI

. This is my first domestic car, so it's interesting to drive something different for a change. Got this as a DD while I work on my other cars, so I don't plan on doing too much to it other than some basic bolt ons and maybe an ECU tune (...and maybe a cam

).
Right now, I'm looking for a 10 bolt rear if anyone has one. Grinding is killing me