My car is out getting a roll cage and rear anti/roll bar installed. I'm having him also roll the outer fender lips. The rearend is a 66 12 bolt. I what to get a 12.50-28-15 E.T. street under the car if possible,without any other mods. Does anyone out there have this combo on a 66 chevelle and if so, what wheel and backspace are you using to make it fit. Does is rub anywhere.I will have minimun body roll with the anti roll bar. I know that a 11.50-28-15 E.T. street will fit,but I would like a little taller tire and wider tire to handle the motor and gear.I don't know anybody with this tire/wheel combo that I could trial fit on my car to see if it will fit.Don"t want to buy the tire an have to chop up the car to make them fit. Need you help

66chevelle
468 cu./in.
turbo 350 full manual
4.11 gears
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