1970 dodge dart tallest tire

I currently have 225 70 15, on 15x8 with 5.5 backspace. I want a taller tire for highway driving. I have separate wheel and tire for racing(26x8.5-15) on 15x8 with 5.5 backspace.

Is it possible to run a 255 70 15, 29" tall?

Thanks
:popcorn:waiting for replies