Streetmaster to Airgap
So now your argument is the restrictive exhaust played a big part in why it didn't make that much difference?
Funny isn't it how the guys who race in the F.A.S.T Factory Appearing Stock Tire category have to use cast iron manifolds and they make LOTS of power...
Look at that tiny port opening it looks to be smaller than a 318 port window in size and realize it wasn't hindering those 360 heads all that much.
So now your argument is the restrictive exhaust played a big part in why it didn't make that much difference?
Funny isn't it how the guys who race in the F.A.S.T Factory Appearing Stock Tire category have to use cast iron manifolds and they make LOTS of power...
Look at that tiny port opening it looks to be smaller than a 318 port window in size and realize it wasn't hindering those 360 heads all that much.