it is though. you can reuse the roller lifters on a reground camshaft. how mild or wild are you thinking of for the build? if it's going to be a street build, looking at maybe 5500 rpm max, good torque, looking at bullet's master list, I'd look at the HR266/325 lobe for the intake (266adv/214@.050/135@200, .325" lobe lift, .487 with1.5 rockers) and the HR269/327 (269adv/218@.050/138@.200 lift, .327 lobe lift, .491" lift with 1.5 rockers). Hughes #1110 springs should be able to control that cam just fine as well. since they grind the base circle down to get the new cam profile ground on there with more lift/duration, you may need to find slightly longer pushrods. I remember 20 years ago when I did this to a roller LA 318 out of a 5th avenue that I also put magnum heads on, I was able to find the right length pushrods off the shelf from comp cams very reasonably.