Yes, but I assume those are kept together and the lifters kept in order? The original premise was to put a used set of lifters on a completely different cam. Different kettle of fish....
There does not seem to be any issue having the lifters re-ground.. I've done that too, and am getting ready to put regrinds on a new Isky cam... I'll trust those particular re-ground 70's GM lifters more than new stuff. But that was not the topic.