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It's likely an IGP 4502D, i have 2 just like it.

We posted on this (Assembly and connection) a bit up, and i showed all the pieces of that dist. There should be no "stop screw" or anything on that arm, and the bolt that goes through the arm and pointer and spacers, etc should be through the END of the arm. There should be only one hole in that arm, but since there is more, ignore the ones not on the end.

You mentioned you fixed it and if so, great. If it's still like it is in the above mentioned picture, when you do get a working vacuum diaphragm, and it pulls the arm, the dist can't rotate properly because the geometry is all off and the arm is trying to pull itself around a corner, instead of straight.

Put the bolt through the end of the arm, put the pointer and spacers in the right order, and put the pointer in the center of the gauge scribed on the bracket that the arm connects to. You will also find that this is going to rotate the distributor advanced some vs its current arrangement, and you might have to correct your plug wires by moving them one hole over after rotating the distributor to it's correct place.

Also, i don't have a spare vacuum can for you, as one just failed on mine a few weeks back and i swapped it out with my spare. If you're having trouble seeing how everything should be setup installed in the car, where #1 wire should be, etc, i'll be happy to take a pic for you.

What is the part number for the vacuum can for this dist.?

What engines and models are these dist. on?

I don't know the part number, but both of my distributors were from a 53 327.

You could call max merrit or kanter and tell them you need a vacuum actuator for an autolite 4502 and they likely have what you need in stock.

The number on your distributor would indicate an Auto-lite starter motor. Here's a list of Auto-lite vacuum cans, the cars they are used on, and illustrations of some of the types. It may not help, but it can't hurt.

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