i am haveing the motor torn apart and rebuilt...or i have had that done... it is on its way back....i have a chance to get the PRICHARGER P1-SC with the 3 core intercooler for 2500 with everything i need on it.. Can it be upgraded to the F1 or is the D1 as far as it goes....Right now i am at 269 rwhp and 310 rwtq i want to push 8-12psi in the gt but want to know the cost to upgrade.. let me know k thanks...oh yeah how hard is it to install them????