Here is an example of myself burning a pushrod recently with the car IDLING in my driveway LOL, putting on a different carburetor ,didnt set the idle at 1200+, car run for about 10 minutes trying to make adjustments , idle was in the neighborhood of 600-800 rpms( lower oil pressure and volume) smoked cylinder #2exhaust and broke cylinder#2 intake cup 440 roller cam harland sharp rocker springs 550lbs open lesson learned