Ok, this is a goofy question but maybe somebody can help me out. While the motor, 454 Mark IV based, was apart I lined it up at TDC for ease of installing the distributor etc. However, my friend "tested" the new mini torque starter and now I have no idea where the motor is. The aluminum timing cover has no timing pointer, I have to make one for it. The timing cover is on and the motor is in the sub frame. Taking it apart is the last resort. I put the motor on the compression stroke, both valves closed, piston coming up. So, is there a way to accurately determine TDC? Can you determine anything from the crank keyway? Can you measure rotations between a certain valve open and closed and divde by a magic number, anything?!?!?