Hi everyone, brand new to the forums and about to embark on a first build with my son. Actually his first build and first car! He's planning on building the 818C, and I really need some advice/info/help.
We bought a 2007 Impreza with an unusable motor and auto trans for next to nothing. My understanding is we could put in an Sti motor with either a 5 SPD or 6 speed. I know if we use a 6 speed it has to be an 06-07. My questions are
1. Will any 02-07 motor work with the wiring harness?
2. Will I have any issues going from an auto to manual with the wiring harness?
3. Anyone have a preference on the 5spd vs 6spd?
4. Are the motor mounts the same for all years/models?

Any help would be greatly appreciated.