Early A Big Block And Motor Plate

Thank you. That helps a LOT! Mine may not end up in the same place, but I have a great illustration of how to find "where it will go". I assume you located the transmission mount in the cross member, "and then" squared it up "from there"?

Yep. We bolted up the trans mount and dropped plumb bobs from the output shaft center, and crankshaft center. We moved the engine side to side until both plumb lines were in-line with the pinion centerline on the rearend. The pinion offset is in the stock location per Dr Diff's instruction. That's where we locked in the engine location. Not sure if that's the proper way to do it, but that's how my dad and I did it. I'm sure it'll be fine though.

I can't recall how we determined the height. This is when we were locating the engine:

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