I've got a 92 LT1 vette just did cc503 cam, lifters, roller rockers, guideplates, etc the whole nine. I'm having an issue with power under load. I can have it in neautral sitting in my driveway and it'll run great, idle well, and rev to the moon but as soon as I take it out and actually drive it, it's like it's got no power above about 2500 rpm, punch it and she just falls on her face. Anybody have any ideas?

Yes it was tuned by PCM of NC, just a chip tune but they're apparently pretty spot on. Also when I put the cam in I had to jack up the motor about half an inch to get it out over the front frame rail. Any sensors or anything I could have broken?