I changed my worn bronze gear out to the Hughes Hug 6213 $169.
It's the crane gear 66970 with shaft installed. I installed it on a used cam with a M63hv pump that had a high pressure spring in it. Everything they tell you not to do. Lol I pulled it out after 1 year to check it and it and the cam looked perfect.

I did have to emery cloth the shaft to get it to spin freely in my bushing.

I also put a collar on my MSD.

Here's a thought on why some wear worse than others. When I was using a Mopar distributor and I ran the valves the bronze gear looked great. Then after I changed to the MSD the gear was worn when I checked it. I didn't have a collar on either of them. So I wonder if the shaft on the Mopar was maybe a little longer and kept the gear from climbing up? Of course I didn't think of this until months after everything was done. Lol Mike