Got the new distributor in a week or so ago. Pretty nice looking piece:
Took some measurements, and it it looked like the oil pump drive under the gear is just a hair longer then the factory distributor. I went ahead and stabbed it and fired the car up. I set the timing to 10 degrees advanced like the old one was (spout out of course). Oddly though it was idling at 700ish rpm opposed to the 1K rpm that it ran at 10 degrees with the old distributor. I reset the throttle stop so it idles at 1K again (any lower and it normally tries to foul the plugs, though it didn't smell rich this time at 700rpm). The random roughness is still there, car starts easy and pulls hard like it always has. One other thing of note, when looking at the inside of the old distributor cap, the burn marks are very low on the electrodes (right at the tip), where as on the new one the arc marks are right in the center of the terminal. Not sure if that is better or not (I would think so), but it was something I noticed.
Took some measurements, and it it looked like the oil pump drive under the gear is just a hair longer then the factory distributor. I went ahead and stabbed it and fired the car up. I set the timing to 10 degrees advanced like the old one was (spout out of course). Oddly though it was idling at 700ish rpm opposed to the 1K rpm that it ran at 10 degrees with the old distributor. I reset the throttle stop so it idles at 1K again (any lower and it normally tries to foul the plugs, though it didn't smell rich this time at 700rpm). The random roughness is still there, car starts easy and pulls hard like it always has. One other thing of note, when looking at the inside of the old distributor cap, the burn marks are very low on the electrodes (right at the tip), where as on the new one the arc marks are right in the center of the terminal. Not sure if that is better or not (I would think so), but it was something I noticed.