Great Thread:

The roller is definitely the way to go. Here’s an article that discusses the finer points and the pitfalls – which are many if you want to convert a pre-87 block. If your machine shop will get you a roller block, I’d go for that.

Don't know what your paying for all your machine work, but here's something to consider: The GM Part Number 10105123 is a “Heavy Duty Production, Cast Iron” bare block 350 with, 4 bolt main caps and the 1-piece rear main seal that’s ready for a roller camshaft and it’s about $750 from your local Chevy parts counter


http://www.chevyhiperformance.com/te...cam/index.html

Have fun,
Glenn