if you can find out how much they shaved off you heads and block and stick the amount they took of under the rocker shalf to get you rocker rasheo back its easey to do and a lot of people over look it alls you need is some shimms if you have what this will doo is give your cam the lift its supposto sorry guy about the spelling which in turn will give you more compession . hope this help i hade it happen to me and i play with a lot of them robert