It was pretty good HP but the torque was really really weak (for a 4" arm) which means the cylinders were not getting filled-period. The SuperVictor is a sensitive intake that likes the port flange to be LARGER than the head port especially on the floor--I leave a .075" step/mismatch-this helps torque. Take a look at what happens to the Big Chevy guys when they use the "wrong" intake. This is why I never get too worked up over port matching--it usually isn't worth the time on lower RPM , street/strip stuff. J.Rob