You can make it work about any way it drops in, but it is supposed to be clocked. You get #1 cylinder lined up at TDC with the timing marks lined up. Then you line the slot in the distributor drive up so it's pointing towards the front intake bolt on the drivers side of the motor. From there, you drop the distributer in and line it up to fire, and set the number 1 plug wire where the rotor is pointing. I'm not the best at explaining things, so I hope that kinda makes sense!