Now using the stock 250 head will their be any appreciable gain using lump ports? I am also building a low RPM ( idle to 3500) truck motor to use pulling a small trailer if the swap meets ever start again.

Last edited by jalopy45 #4899; 04/16/20 03:58 PM. Reason: spullin
'45 Ford PU
66 Valiant wagon, leaning tower of power.
79 Chevy C10 w/250
02 PT Cruiser Convertable