You are saying what I was originally thinking. Obviously, just forcing air into a junkyard 318 and changing nothing is gonna end poorly. All things being equal, with proper controls, I think one could boost to the point where the internals, (mainly the crankshaft in this case) are the limitation.
I will check out that read. Thanks for the info. I have said for a long time that the best performance part one can buy is usually a book..