The material that the distributor gear is made from depends on the material the camshaft is ground from (billet vs cast, etc.). Just make sure you get a gear made from the correct material.I pulled the gear off the shaft after punching out the pin. It's brass. Makes sense to me so other gears don't get destroyed. Are they always brass? I'll try to find one at a parts store out here. Hawaii can be tuff to find parts sometimes. May have to order on-line. $50 on-line at Napa.
A bronze gear should last much longer than 2,000 miles. I read some of your other posts. Sounds like your motor is pretty much stock. I doubt there is a billet roller cam in it. To be sure you could pull the intake. I would put a new cast gear on it and check the gear engagement with the camshaft.I don't know what kind of cam was put in there. I bought the car restored. An eng shop rebuilt the eng which has 2,000 miles on it. I don't know which eng shop. I think it has a beefed up cam.