I'm going have a dana 60 installed in a 67 satellite that has been mini-tubbed. I was told that in order to narrow the dana correctly, I should buy the wheels and tires and mock it up by putting them under the car and measuring. I like prostar 96's 15x10" wide but I'm not sure about backspacing. I can choose 5.5, 6.5 or 7.5. The engine is done,I have about 650-700 Hp and I want the car to be streetable. Should I pick the 6.5" backspace? I think maybe the ET street would be a good tire but I don't really know. I want to drive to the track, shows, etc. I appreciate any help, this car has been in my barn for at least twenty years waiting for me to put it on the road.