65 Barracuda Tires

Jake's 65 is running 205/70/14 up front and currently 215/70/14 in the rear. SBP rallyes all around. For his birthday, we gave him a pair of Wheel Vintique's 15x7 rallyes with a 4.25 back space for the rear and we are figuring out how big of a tire he can squeeze under it with no mods.