bro,
if its done properly,it shud not give u problems.i have a buddy who has done it and its running till now without any problems.his running,on mivec head,ori mivec wiring and ecu also with mivec gearbox except for the 93p block(unsure of what kinda piston) la....oh yea,had to use i guess t/supra timing belt...but unsure of which model its from.
happy modding and all the best to u!