I'm using the high quality fel-pro gaskets for my long tube hooker headers. I've felt around before and have not felt a leak. I'm just starting to assume this is the way the motor sounds the way it is set-up... The motor has awesome power, no hesitation, fires up the first time every time, and oil pressure is 75-85 lbs. at idle. I'm the only one with a Ford motor at my shop too, everyone else has small black chevys . the chevys sound smooth with a mild cam and roller rockers. I just dont want to wipe my cam out!!