Quick update - Hooked my 700R4 that came with the car to the trans dyno:
All the pressures are within spec, engine shifts and downshifts; trans is in pretty good shape (least until it takes some big block torque). Going to put a filter in it and its needs a pan gasket bad.
Trans ready for the engine:
Trans should work until I can build/afford something else (current plans are to build a 4L80E with paddle shifters).
Pulled the engine off the stand:
Put the beater Chinese valve covers back on that I couldn't get to seal (I do like the Chevy Orange).
Bolted up to the trans:
Went to try to bolt up the torque converter to the engine flex-plate, found out that the big block flex plate won't mount to the 700R4 torque converter. I guess GM makes a conversion flex-plate but its a special order and will take a few days to arrive.
Now I'm stuck, waiting on brakes, wheels and a flex-plate. Ah the little things of getting a project on the road. Oh well time to drive in axle seals, and adjust hood and trunk a bit while I wait.