forget about modding your current ride, i know it sound rude, reality check my friend
if i were you, i'll be looking for another option, search for the 'beat up' car for a 'project' car, with all due respect, i'm not very much a mitsubishi fan, the best i believe for modifying a mitsubishi car is from the evo III model, swapping engine for them is much common, you even can play with the gearbox making it a AWD or a 2 wheel drive, but then again, this all will involve a lot of $$$$, by the way, 'playing' with cars is not cheap