To me, and it's just to me, Jerry's procedure is to labor intensive. Here is how I've done it since making a big mistake on a '58 Corvette. Pull out the #1 sparkplug. Put your finger or thumb over the hole and have someone bump the starter a bit at a time until your finger/thumb is pushed away by the engine compression. Then look in the bell housing hole for the BB. Tweek the crank one way or the other with a bar or pulling on the fan belt, to center the BB. It won't take very much turning, like maybe an inch or two. Drop the distrubutor in with the rotor pointing to #1. It should fire right up and you can set the exact timing with your light.