[njk53]

The rivet and the copper circular clip used on passenger car was also used to keep the drum from vibrating off of the vehicle when it went down the assembly line.

I remember reading an article in either Car Craft or Hot Rod Magazine about a company out of Texas that manufactures a brake shoe that has 30% better stopping power over ordinary brake shoes. Sorry, I don't recall the name of the place but maybe you can search the internet and find them. This would be a little better alternative to stock shoes if changing over to disc brakes is out of the question.