[OrrieG]

Assuming the clip is square and level to the ioriginal frame, just make sure the engine is parallel with the center line, a little offset is got a big deal. Pinion being offset is not a big deal either, universal joints need about 4 degrees offset to work best. Make sure the carb base plate is level, this will give the block and transmission about 4 degrees down angle to match how they were originally configured. That will set the trans crossmember mounting location.