I have, and even though you were told you are throwing you money a way buying a converter! it will help that cam work like it's supposed to.
It's all about matching part, to make a good package(good running eng.) if you are determined to use your current cam, you need a better converter.
They say you're throwing your money a way because you need to fix the simple low cost things first, like you carburator....Ya i know Bla, Bla, Bla......So a converter is a good step.(until you find out just how much a good quality one cost ! LOL
