Same block same cam same lifters- safe to reuse? Setting preload?

Just like everyone else said, perfectly okay to reuse. But what is the rest of the build like and why no upgrade to a larger cam? These 4 inch stroke motors like to eat, so unless it's got nearly stock iron heads and is going to be used as a tow motor I can't see that small of a cam for it. I know of one of these engines in a 4500 pound extended cab truck with 11.4;1, Eddy heads, air gap, headers, and a Comp XE 274 H. It acts like it wouldn't have had any problems with the XE 274 HL that was intended for it. But that cam was used and the assembler didn't want to run it because it had seen some pretty severe valve float involving a 200 shot of N2O that wiped out the lifters that were run on it.