Yeh I know its a preety vauge qeustion Im sourceing a new engine taking my time so it will be a good condition engine, for my 33 GTST and stocking up on goodies to add on in the mean time all I want to know is whats the biggest turbo you can use if you change to sard injectors,N1oil pump,N1water pump, high mount manifold, metal head gasket,FMIC,radiator breather,air flow meter,oil cooler,oil catch can,powerfc with boost controller,fuel regulator,bosch fuel pump,BTMBL split front dump and 3" zorst etc etc... but leave the internals stock?