You CAN use any 95-07 n/a motor if you are willing to put a few mods on it to make it safe to run. The blower will not 'destroy' a n/a bottom end, but it will put a beating on it if you are not careful. what do i need to mod or change to use a series 2 engine ,the reason that i thought that a series 2 wouldn't work in place of the series 3 was due to the difference of the internals i assumed it would just fall apart running the super charger ,but thats why i came here to ask about it