cam choice for a fuel injected 340/416

t56maxtorq motor mounts not a problem and a crank sensor as well hipotek makes them my biggest problem is finding a cam that works with fuel injection and a flat tappet . everything seams to be based on a roller cam which is in a magnum block. i have a purple shaft 284/284 - 528''lift that i had in my 340 before loved it but i dont know if it has to much overlap or how it will affect vacuum also i think this cam might act milder in the 416