17x7.5 and 8.5 wheels

[jgh1975]

I'm looking at getting some Rota RB wheels, 17x7.5" up front and 8.5" on the rear with a 4mm offset for both for my '75 TR6. What kind of clearance issues am I looking at if any at all? My biggest concern is, obviously, if they will even fit on the car.
Any suggestions?