Well my car ran 12.22 with a 1.66 60' with slicks a few years ago, the carb was jetted way off and very rich to the point of a slight miss. now with the jetting right and a few other things worked out i would say i would be in the 12 flat to high 11's range, so they should handle that fine, if your looking for the last tenth or two might as well get a extra set of slicks and rims. also these tires hold air very well aired them to 28psi in may and they were still at 28psi in September.