revnkevn........build what YOU want, also ALL 327's were 2 bolts, large or small journal cranks. The blower would be nice but not nesessary to achieve 350 hp. The main thing you want to do is find a REALLY GOOD machine shop and talk over your build with them.
Preperation is everything, The right machine work with the right combination of parts will allow you achieve your goal. Just remember it will still be a 327 or 331 cubic inches, not 350 or 383 and the power will be sacrifised for "nostalgia". Here's a pic of my 331" SBC, never got to dyno it but it sure sounded good....enjoy your build.