Summit 6 lug vision wheels and tire size

[ryans69chevy]

Narrowed it down to the 17 x 8 vision 141 series gunmetal 6 lug wheel with a 4.5" backspace. My question is tire size... Looking at getting the widest tire I can that will fit all the way around so I can rotate my wheels and just for ease. It seems that a 255 is basically it for width for the front which means that's what I'll have to do for the back. Let me know if that is correct. Prob gonna do between a 50 and 60 series tire. Don't want any rubbing or any problems!

My truck is a '69 with 2 1/2" drop spindles stock height springs in front and 3" drop springs in the back with a '69 rear end. Baer 13" discs all around.

Thanks,
Ryan