So.. you want to build a 600hp engine for a 20 year old beat car? I normally stay out of this stuff but take it from someone who just bought a house and wishes he had all the money back that he spent on car parts, beer.... dont
if your going to even consider something like that, look into a crate 434 or something already built so your not waisting tons of time and money building, if you want to get raked over the coals you can go to shafirof or a compeditor,
http://www.ultrastreet.net/434_classic.asp best of luck tho. Just my $0.02