id go with the t34

you can set the psi to run the 310 bhp you want allowing you to crank it up further if you like

A t3 at 310 bhp is on its limit and not likely to have a long life running at that Your also stuck if you decide you want more power

If you decide on a t34 the .48 has the least lag but id say for track days the t34 .63 would be better for more top end power or you could do what i did and pick the one in the middle t34 .55

Also, make sure it has 360 degree bearing