C chevynovaman New member Jul 7, 2009 #1 what would happen if i put 305 h.o heads on a 350 would i get worse fuel mileage more power or both
D Deric New member Jul 7, 2009 #2 It will boost your compression up. So you would get more power with worse fuel mileage. With low RPMs your mileage should be about the same but high RPMs your mileage would be a lot worse because your motor would need a lot more air.
It will boost your compression up. So you would get more power with worse fuel mileage. With low RPMs your mileage should be about the same but high RPMs your mileage would be a lot worse because your motor would need a lot more air.
