295/65/15's Anyone?

1968 Barracuda Convertible with Nitto 275/60-R15's on 8" rims. They don't rub. Not too many drag radials available in 275/65-R15 on Summit's site.

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275/65/15? That's a size I've never heard of before. I'll be going with a 295/65/15 MT's. Curious if anyone here's ever run that size on one of these A-bodies.