If you go with one of those hydraulic rollers from Howards, be sure to ask if they are ground on an LA cam blank or a Magnum cam blank. The difference is the nose of the cam on Magnum's is shorter, and not made to run a mechanical fuel pump eccentric like LA cams are. I put a hydraulic roller ground on a Magnum blank in my 273, because that was all that was available during the scamdemic. I had to buy a cam snout extender from Hughes Engines to be able to run a mechanical fuel pump. It looks like a Mickey Mouse piece to me, but several people on here said they work fine. I got my cam from Bullet Cams. They ground it to specs for an old Lunati roller that I wanted for the 273. Works good so far. Made surprisingly good power for an itty bitty motor that is pretty much stock. If the fuel pump eccentric adapter lives, I'll be happy! The Howards 770525-10 looks like a pretty decent cam. Use Morel hydraulic roller lifters with whatever cam you choose. You will most likely need to get your lifter bores bushed also. Good luck with it!
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