everyone is gonna ask what turbo since it makes a difference..t3? and do u plan to upgrade fuel etc..there is no actual answer for this ?..but theres things u can do to make say 10psi on a t3 more reliable ..injectors good tuning etc...u can just slap a turbo on a go but dont be upset when it blows etc...if u want it to last do it the right way and build the motor first..or atleast get good tunin , fuel etc..