IMO, Performance aftermarket retrofit hyd roller lifters aren’t going to give you the same kind of quiet operation you’d get from an OE HR cam & lifters.

The more aggressive the lobe profile is, along with the higher spring loads usually associated with that type of cam....... the more noise you’re going to get.

This is one of the better HR FAQ pages I’ve seen:

https://www.gatermanproducts.com/faqs.html


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