Welcome! There are a few guys here with some swaps and the resident gurus camoit, geezer, etc.. that are very knowledgeable and im sure will chime in. I am planning for the same swap on my mm! I plan for the 400-550 range build but am building the stocker for in the mean time. I have found doing some research that there are some trans that do not require a massive amount of fab work to fit certain trans. From what I hear t5/c5/c6 and some newer style (mid 80s+) ford trans are smaller.