before i proceed...i wanted to know of any faults, i have a 87 turbo 2....the t70 has a T3 compressor flange....will that affect it or will i be ok with this turbo....is the t3 opening too small?

 

T3 is a small opening and will restrict the power potential of the turbo a fair amount in a rotary car. find a T4 flanged turbo if you're gonna go all the way.

 

i only want 10psi....will i still need to find a t4 flange or will i be ok....i dont plan to go all out...

 

it wont matter how many psi you want 2 run,a T3 hot side is smaller than a factory S4 or S5 hotside.Some people do run T3 turbos but they want really fast response and is more for road racing or some other type of racing that does not required top end performance.