I happen to have a turbo from a TTA. Will this thing be able to work on a 327 and run any boost at all? I don't need more than 10...I really plan to go maybe 6PSI.

 

I am assuming you are talking about the '89 TTA and not the '80 TAT. That turbo is the same as the GN turbo and makes 15psi on a 231 cid engine. I don't know how serious your 327 is, but a T3 based turbo should be able to get you to 6psi without much problem. Without more flow data for your specific engine, it's hard to say if you will be able to efficiently make 10psi, though.

 

The turbo will work, but the PSI is dependent on the airflow through the motor before the turbo.

For example if the air cfm into the engine alone is 400cfm and the turbo maxes out at 425cfm, then you won't get much boost. If the turbo puts out 600cfm (vs the motor at 400cfm), then you can make good boost.

The T3 is the smallest of the T series turbos and does not flow that much CFM. It also is inefficient when you get more boost (i.e. higher temp air) pumping. You can upgrade to a hybrid t3/t4 or a t4 is you need more boost. The flange is the same, but the air inlet/outlets may be different.