I doubt they are bigger or if they would give you any extra hp. I know the injectors are different, so youll be running rich.
Doesnt sound like a good idea. If you want more power take off the head get them ported and polished and some cams or just do a motor swap
Doesnt sound like a good idea. If you want more power take off the head get them ported and polished and some cams or just do a motor swap