Dart shp short block- street recommendation?
Looking for advice for a Dart SHP-based 400 short block. Will be used on street in a 57 Belair hardtop. Local shop said stay away from 434/427 with this block, stay with 415 or 421 motor. Overheating should not be problem: have Griffin aluminum crossflow with dual electric fans and temp switch. Beefed 700R4 and 9" with 3.50 posi. 770 Holley Street Avenger on Motown single plane. Cam is Comp Cam middle Thumpr, 235/240 @ .050, 522/509 lift hydraulic roller. Power band peak under 6000. Looking for torque, top end not that critical. Which way to go? Thanks. Mep