I know the Dodge 2.2 and 2.4L will bolt up to a 4 cyl First gen Dakota tranny. So you "could" get an old Reliant, Omni, Caravan... etc. 2.2/2.4 Turbo and build them to well over 500hp easy. Now if the new SRT4 2.4 uses the same tranny bolting circle then you're off to the races.