[dscott]

This is a problem I fought for years and finally resolved. From what I know the only cams that cause this problem are the Ford 302 and 351w. Most cam mfgs buy their blanks from 2 different companies so the brand typically doesn't matter. The problem we discovered was the cut of the gear on the cam is to sharp. The only way to fix this is to burnish the cam gear on a wire brush before you install it. If this isn't done you will eat distributor gears for awhile. The first one will usually go right away and then progressively get better. After about 5 gears the problem will go away. I can't tell you how many years we fought this with no help from any mfg. I always got the same answer, don't use a high volume pump and use plenty of lube, or the distributor gear is not at the right height. I've tried many different brands of gears, changed cams, distributors, you name it. The fix was as I stated. Since I started burnishing the cam gear I have had no distributor gear failures in 4 years.
Don