421 or 434?
im going to be ordering my crank tuesday. im using a stock 400 block. i want to build either a 421 or 434. is there less clearancing with the 421? i dont want to weaken the block anymore than i have to. do i have to run a small base cam with both? id really like to do the 434 but not sure if the block will last to long.ive got brodix track1 heads 228 intake runners 2.08 intake 1.60 exhaust valves. probably around a 630 to 660 lift roller cam. 750 aed carb 4500 stahl 350 turbo with brake. not sure what gear yet probably a 28 or 29 inch tall tire. what gear would you recomend? what kind of times do you think it will do? i run 1/8 mile.oh yeah thinking about some small dome pistons. 11.5 to 12.1 ? any help would really be appreciated. possibly some NOS to