Get a timing lightgun. Loosen the 3 bolts that hold the distributor so it has some play. Look down at that crank pulley, turn on the light, and it aim it there. You see a hash on the block and a hash on te pulley. Move the distributor until thos 2 hashes are as lined up as you can get them. Tighten the dist. bolts back up. Check it w/the light again and there you go.