Wheel/Tire help for 68 notchback barracuda

Cool, congrats sweetmopargirl, I'm very happy for you, a 68 notchback can hold some really large rims on the back (15x10), but to avoid problems with tire rub I recommend going with a 15X8" on the rear and for some contrast 15X5.5" or 6 on the front. Important to deal with someone that really knows there backspacing and forward spacing when buying rims, inorder to get the right stance for your car. Sorry I would measure the backspacing off my notchback for you, but my car is at a different location. If your car still has the small bolt pattern and you don't want to spend money to convert to the bigger size, there still is a large selection of new rims available for small bolt (checkout Summit's website it will give you some visuals). Most Mopars I see that are street cars, usually are running on B.F Goodrich. If I'm not mistaken a 60 series tire will have a taller side wall then a 50 series.
Sweet Mopar Girl post some pics of your new ride or you know the routine on here, everyone will bug you about it.