If you go bb, i built a 4.5 stroke 440 at .030 over for 535 cubes that was a torque monster. With ported 906 iron heads, pistons .100 in the hole, a mopar 590 cam , wiend team g intake and 800 holley dp it went 10.60s at 3400 lb race weight. My point is that 4.5 crank made so much torque even with crappy heads carb and intake, and poor gear ratios it still went tens. It needed a very tight ten inch converter to keep stall down to a liveable level. My first twn second passes were made with a stock converter from a 426 Hemi( same stall as a 340 or 383 factory converter). It ate that converter in six passes though. Shift points were 5700 and i may have been shifting too high.
