Don't know who did the porting but looks fine to me .. plenum is matched to the TB fine the motor I put back in the Mazda had one so I didn't need the other one on the original motor
Well, don't know if it helps or not, but that looks like one of my old porting jobs! Far as I know, I was the only one making my own butterflies out of aluminum, and that looks like one of 'em.