ok im in the process of rebulding my 302 and for temporary use im going to use my stock upper and lower intake i wanna run a 75mm throttle body on the stock intake manifold until i buy a trickflow or holly so im wondering if a bigger throttle body will fit on my stock intake manifold?
ok im in the process of rebulding my 302 and for temporary use im going to use my stock upper and lower intake i wanna run a 75mm throttle body on the stock intake manifold until i buy a trickflow or holly so im wondering if a bigger throttle body will fit on my stock intake manifold?
It will not fit properly without a larger EGR/TB spacer. You will need to remove the upper intake manifold and have the TB opening enlarged to match the TB & EGR/TB spacer opening. In order to get the most benefit out of a larger TB, the opening downstream from it must be the same size as the TB opening measured at the TB flange.