Put the timing cover/timing indicator on with the damper and a degree wheel if the damper is not marked 360*. Reset the crank to #1 TDC using the degree wheel and check the damper/indicator. Check the damper to see if #1 TDC is correct on the timing tab (or close). This will tell you if the keyway is in a non-stock location and you can adjust cam timing and timing marks accordingly. Cam timing using a degree wheel set to #1 TDC will be accurate, regardless where the keyway is. Use the adjustment in the timing set to put the cam where you want it.