I put a new cam in my '87 Grand National. Also installing new timing gears and chain. Cam gear is a no brainer and can only go on one way. My question is for the crank gear. I know how to line up the dots on the gears. However, since there are 3 slots for the crank key on the crankshaft gear how do you position the crankshaft so you know you're using the correct key slot on the gear since each slot is 120 degrees variance? Do you set the crank where the #1 piston is TDC or what? Any help would be appreciated. Thanx