Review on Competition Cams Hi Energy Pushrods 1955 1976 by Christopher Lance

This is terrible! I installed the kit on my Pontiac and a month later the starter valve rattled. I pulled the rocker and the pusher mushroomed. The ball at the end is pushed into the tube. Replaced it with a different comp pusher and after 300 miles the same thing with a different valve. This is due to the adjustable valve train. I pull them all out when I find stuck pushrods. They're not worth buying unless you want to swap out parts and adjust valves.