I have been looking into rebuilding a 2 bolt 350 I have in my garage so far I am looking into the following setup. Bore .030 and utilize a 400 crank. rpm performer intake and camshaft, holley 750 double feed and a set of rebuilt 416 chevy heads which were from 305 H.O. blocks. The heads I was thinking of some decent z28 replacement springs since cam is mild and oversizing intake valve to 1.94. Do you think this would get me good enough flow and compression and would it cause any issues being the two bolt main. I dont think it will be rough enough to end up with any crank walk. I have been thinking of a 200 shot of nos but think it would be a little extreme on the block being it is 2 bolt and might wanna invest in a 4 bolt on that one. Any how I am not quite sure of the potential of a 2 vs 4 bolt main and any help would be appreciated. Also as far as trannys go which is recommended for a good racing combination 5-speed manny or th350 and what gearing would go good. I have been thinking of a 350 with 411 posi or the 5 with 511 posi.