Thermo Quad for parts

Not sure. Now that I know what it came off of, I already have a good BB version here, and no BB engines in my "fleet". I'm wondering how interchangeable parts are between different TQs?
I have a couple of "smoggy" SB TQs here that are in good shape, freshly rebuilt, that id like to combine parts from, and make them less "smoggy". Is there a guide somewhere that tells what can be swapped out between different versions?