3.91s in my 340 now!

Are you actually getting 3200 rpm's of stahl? I might think not, and then the single plain intake with that .284/484 cam (I think that's what it is) it was a little lazy till it hit a "point" in the rpm band.
Well, I have no idea what your speaking of. I am a novice. I know barely s*** about motors and performance-related topics. Just being honest.