I don’t believe those engines ever came with HR cams.
If you’re sure it’s a roller cam, then it should be a steel core........ which would require an upgraded drive gear.

Wearing one of the bronze ones out in 5k isn’t all that unusual.

These days, many are opting to use a melonized steel gear instead of bronze.....especially for the street & street/strip stuff.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads