Sounds like things were right on the setup. I do run in mine with a set of break in (light) valve springs, and a set of 1.3 rocker arms. It would, however, be a lot of expense for only an ocaasional cam change. I have these pieces left over from my days in and autotomotive machine shop. Heavy valve springs and high cam lift rates do put a lot of stress on the lobes of a new cam....