DLBrooks,
Thanks for responding. Your pictures are interesting, the center mount looks like 2"square tubing? The ends maybe cut in half and that would rest on the bottom frame rail?
Would you happen to know the dimension of the thru bolt on the frame and motor mount? From side to side maybe 15-18 inches? What starter will you be using the one that bolt to the block or the bell housing mount? Looks like a Doug Nash 4+3 transmission that should work well with the rear.
I have a Borg Warner world class T5 in mine with a 3.90 rear, the fifth gear makes a world of difference.