Originally Posted by MyLittleBlackBird
The f-body intake can flow better, supposedly. That is my understanding. I think you probably lose the 5 hp due to the smaller plenum size. Nothing that can't be fixed with a little cut and weld action
The plenum size probably isn't that much smaller since a large portion of the FWD L36'* plenum is filled with the intake runners themselves.
The RWD TB is significatly smaller than the FWD though.
I have both the RWD and FWD UIM/LIM in my garage. If anyone has any measurement questions just let me know. (except for volume stuff, that takes a while)