So MHS just got back to me. They say that with their stage 2 PI head package (with the stage 2.5 Cam), I would get into the 320-330 range at the tire. I would be looking at more with the TFS 185's that they rip apart and put all their own stuff in it.
The price tag on this stuff is a bit shocking though. The PI Head package (stage 2) with Ford GT followers is $3459 with any Cams you want.
Basically arrives ready to bolt on.
I guess I need to get a second job. LOL