extreme efi ported/bored tb

[primal1]

is there a difference in the ported throttle body and bored throttle body that would make a difference in a stock 5.7 l31. all i have is a superchips tuner(hopefully in the next month a tune from justin), upgraded to mfi, v-max spacer, k&n filter, cat-back from flowmaster.

[dietzster]

I just put a bored t/b on my 98 vortec 454 from xteme efi.
and descreened maf sensor. I'm very impressed with the difference
even in my crew cab dually, (8000lb truck). anything over
half throttle there is a difference and at wot it is very
noticeable. It pulls way harder than before, made my truck feel
like a little hotrod. Would definately do it again.