ports to big?

That does sound awefully big. I'm surprised the ported didn't go through the port wall if it truely is that big. The lack of low end could be due to the 70mm t-body, the e-303 cam etc. Compared to a stock car, one with H/C/I can sometimes feel weaker down low. Mustang dyno numbers are so hard to tell by, I dyno'd a whopping 180rwhp with a e-brock intake, full exhaust, pulleys, etc... most dyno around 235+ on a dynojet with such mods. the car ran good at the track with a 13.83 at 98.5mph at 3750+lbs. I'd run the car at the track or on a dynojet before dropping a large chunk of change on a set of new heads.