i have a 1985 pontiac parisienne with a chevy 350 i just got done doing a head gasket, valve seals, lifters, push rods, and rocker arms. ok when i was all done i went to start the car and it started right up. but when i hooked a timing light up to it the timing mark was way off the scale, and if you try to turn the distributor it will just kill the motor. also if you try to put it into drive it will drop rpm's really bad and you have to give it gas to keep it running.at work people were saying that either the distributor was off a tooth or that the timing chain stretched or skipped a tooth.i have headers, weiand intake, holley 650 carb, mallory distributor with vaccuum advance. any advice will help. i need the car for a car show next sunday.