Tire Advice for 1968 Barracuda

15 255 60 MT Drag Radials fit well on the rear with 15X8 4.5 wheels with 4.5 backspace. There is over an inch of space between the wheel and rear leaf spring on both sides. No rear quarter pannel to tire clearance issues as well (good clearance). I am thinking about 15 195 65 tires up front. It appears 15 275 60 MT will fit on both the rear driver and passenger side. My passenger side may need a 1/4 spacer.