OK thats good but seperating the front and rear brakes at the master is still a good idea with a dual res. For ex. a small block is a couple hundred pounds more than a six and if ONE wheel cylinder goes you have no brakes period. As for converting to SB, here's some things to consider: springs, headers, radiator, small distributor(or pounding in firewall), no power steering, oil pan(cannot lower with certain types of these special pans). motor mounts(these are bolt in, no welding). I'm sure there is some I missed, heres a really good site link, they really love nova.

http://www.stevesnovasite.com/cgi-bin/yabb/YaBB.pl