Need some advice on slicks for my '67 Notch

275 60/15" street radial on 10" wide/ back space 5". Leaves 3/8" to the leafs. you can add a 5/16"spacer. If you try slicks on a 8"/ 4.5" BS then I use a 7/16" Mr.G spacer. The 29" slick will rub the front, so 28", 9" or 10.5, 10"wide slick. depending on the rim. I did not like 275's on the 8" rim, due too a flabby side wall fitment.