One wire lock-up, 4 spd automatic w overdrive into A-body.
The new, replacement bolt-on crossmember is finished and painted. It's made out of 1/4" steel plate and is easy to put on and take off, as long as the exhaust is unbolted from the collectors and the transmission lifted up with a floor jack. So, it's essentially the same thing I had to do to do to R &R the stock crossmember.
It is extremely ridged, well-gusseted and should add considerable strength to the torsion bar crossmember once bolted on. I still have to drill the two holes for the rear transmission mount. I also made up some shims to be able to alter the angle of the engine and transmission. I have to find my magnetic angle indicator and get the car sitting at it's normal rake.
I gave Dr Diff a call this morning to verify what angle I want the engine/transmission to sit at. He said to match the crankshaft & transmission centerline to the pinion angle centerline and then add 2 degrees of upward tilt to the back of the transmission. That will leave me with the equivalent of a 2 degree downward pinion angle.