just throwing this out there...
I think i am gonna change direction on the build and go with a porsche boxster transmission and a 2010+ infiniti v6 with 326hp, or a infiniti v8 engine.
I have a infiniti and absolutely love the reliability and the power it has out of the v6.
The engines are not that expensive, and there is a few places that do CUSTOM harnesses for the infiniti to work with the infiniti gas pedals with the wireless controls, etc. The only catch is the harness is just as expensive as the engine, due to it being PLUG and play.
The only other problem is that it needs a pressed flywheel ignition timing gear, which can be done, but just a lil more $.