for you guys info.
ST205 or MR2 exhaust manifold can be bolt on directly, but the air intake of the turbo, instead of facing forward, it is facing backwards. dun know if can rotate or not.
u cannot use ST205 or MR2 gearboxes cause those are for transverse engine mount!
use back your altezza gearbox. for auto can take 280hp. for manual it can take up to 350hp.
rear axle can take 350hp too.
let me know how it goes if anyone of u decides to slap in what TOMS mention.
Oh and btw u can put in MR2 or celica low compression piston for reliability sake.