[hound dog]

GENERALLY speaking, roller lifters can be reused even with a new camshaft. Regular hydraulic and solid lifters need to "wear in" to a new cam and should be changed out every time you change the cam. Rollers just roll over the lobes and do not "wear into" the camshaft. BUT, be sure to inspect them thoroughly and replace any lifters that show any wear, particularly in the needle bearings. Bearings don't flow well through the oiling system.
h dog