Does comp even offer rockers for 440-1's? I have used Ersons, Dove, TD and Harland Sharp. Ersons were great and reasonably priced, unfortunately not made anymore. Doves lasted for 2-3 years in our use, might work with a flat tappet or smallish street roller. For what ever reason, we had nothing but problems with TD, the pushrods didn't like to stay in the cups. HArland Sharps worked great, and I too clearanced them myself.