After degreeing the cam, Emley measured piston-to-valve clearance and found 0.260 inch on the intake and 0.290 inch on the exhaust. The minimum numbers are 0.100/0.125 , so the Isky 292 Mega's 0.505/0.505 lift and 244-degree-at-0.050-duration figures are supersafe thanks to the KB pistons' deep valve pockets. At TDC the piston is 0.019 below the deck except for the quench dome that fills the chamber and restores compression. Remember, the KB piston valve notches are indexed to match the E-I-I-E-E-I-I-E valve layout in the cylinder heads. Pay attention during assembly so you don't mix things up and go clang when you start it up.