Bax,
Those sizes will fit. PS has done the wheels for us before, but make sure he uses the offsets here:
http://www.erareplicas.com/427man/wheels/17inch.htm for pin drive and Jag-rear bolt-on. If you are getting the ERA rear with bolt-on, the offsets are a bit different in the rear.
I have no experience with the heat-cycled tires. Anyone else know anything?
