71 Swinger- SBP 8 3/4, No Cutting & Cragars- Possible?

[4speeds4me]

Hoping to use the 15x8" Cragars with 4.25" backspacing. I can live with the 4.125" BS 15x7" pieces if need be, but would prefer the 8's...

Is this doable without cutting the lips?