My heads going round in circles trying to pick the right turbo. I want response similar to a T3 I want something that comes in around 3.5k and will give me the 270-300hp max i require

My engine is forged with big port head etc STD comp ph4 Newman cam .over the box manifold and bigger inlet .

I've been looking at these

2wd cosworth T3.48
4x4 cosworth T3.48
4x4 cosworth T3.48 with roller bearing and billet wheel
Gtx2860 internal gated
Gtx2860 -0.57AR external gate with outlet back into exhaust to keep it quiet .