I'm wondering if used parts from a junkyard V8 could be used. I'm not interested in spending the amount of money everybody wants for roller rockers. I don't think the gain would be worth the expense if you had to buy new roller rockers, you can buy a complete cam kit for less and would surely get much more bang for the buck. I would also be wary of running roller rockers on a dailey driver, maybe they would be fine I don't know.