There are several good books out there. The most popular are "Turbochargers" by Hugh Macinnes, and "Maximum boost" by Corkey Bell. My comparison of the gas and Diesel were just a simple comparison to show a gas and Diesel using the same amount of air at different RPMs.
I can't say what your motor will handle. 5 psi is probably safe on a low compression motor with stockish heads. My usual technique, which I don't recommend, is to keep adding boost until something breaks. I've only blown head gaskets and broke pistons so far. That's on two different cars on three different occasions. No broken cranks or blocks yet. Chevies, and Fords will both blow head gaskets with too much boost.
I think an HX-35 is a good cheap start. A pair of t-3's off a couple turbo coupes or something else. Look around see what you can find a deal on and post what you've found here or at JYturbo. Someone will know if it will work.
I've blown through a carb but I find efi much easier.
Links to guys who know:
check out the calculators here: