with the dyna i would tend to go high hp its a lighter bike for one and by time GG gets that 1/2 ton moving i would try to be so far i front that it would not matter.
now the ST thats a nother story try to build the motor to be used in the power band recomended. from about 3000-6200. with a mild gearing change or 6 speed.
now are thest just bolt on pieces were talking about i beleive, any thing else well it would depend on how much you want to spend.
