thanks for confirming what i though might be the prob. The 30-30 will go back in the engine soon, then im sure the car will be back into the mid 13s. sounds like the difference in the cam may be 50+ horsepower. not worried about the lack of low end grunt since the gear ratios first through third will be 4.27 if i had an M21. then back to 3.73 in fourth. the car ought to pull pretty hard through the 1/4 mile now. Thanks again for all the responses. next mission is to get that 427 car of mine on the track and search for mid 12s, or better!! AWESOME SITE HERE!!