no aftermarket head yet.....what do you guys recommend...i want to use pump gas...93 octane..i am down to the toomeys5or 6 or the rockets....i like the toomeys because they will give me a jetting map on where i should be close to...if i buy the rockets i will just get the pipes and then i will have to guess at jetting.....i have no idea where to begin..although i can read a spark plug i just would rather be close the first time...