save your cash n just get the 4agze engine, 4age is a waste of time & money (no offense) I have had both and the supercharger is a decent power base, buy an oversized crank pulley and the car will be on about 14psi possibly making 110kw atw, my ae86 was supercharged and it was quicker than both my sportivo's... you also might wanna try looking on www.ae86drivingclub.com.au and www.trincam.org they are both great forums for parts and good advice on a 4age engines!