My vote would be go back befor the time of the powerstrokes to the IDI's they run for ever and parts are dirt cheap. Of coures there aren't as many options for performance so not the bast choice if you want to race it. If we gotta stay stroke I'd go with the 7.3 just seen too many of the problems with the earily 6.0s and even more with the IH version vt365s.