Hey Bill ! I read your posts all the time! For now i'm going low boost probably 8 lbs to start. I ordered a 4bbl intake with the offs group buy. I can't wait! Probably gonna go with a Precision 6262 turbo like 74dusterkev on slantsix.org.
I just love it when I hear about projects like this being built. What excites me about it is, I am an obsessive tightwad (never had any money, and never expect to,) and I honestly believe that you can go faster and quicker for less money spent, overall, with a turbo'd slant six than with a V8 swap.
Please don't be a stranger here; there are people here (no me) who actually KNOW what they are talking about and will jump at the chance to help you over the rough spots, and there will be some... LOL!
Your project sounds like you're off to a good start; just let us know how we can help! There are also a lot of folks on Slantsix.org with tons of good information.