215's are a challenge to fit in there, but, it will fit in there. A little more difficult than a Speedway 350. This is with an early car with the deeper tail light box.
This might be the place to drop a repop Speedway 350, just for looks. The repop fits, and is a good "betweener" from your road tires and an original 350.
Nic's (1690) idea is pretty good too.