i want to put magnum 500 rims on my 70 mach 1 but im not sure what size to go with. i want them 15" but im not sure on width. i will be lowing the car approx. an inch so i know this wont help clearance any. i want to put like a 60 series tire all the way around like the bosses had to give it that wide look and that mean stance. but i need to know if i should go with a 7" or 8" wide rim. i dont know which they had origionally or will either fit after the car is lowered. if there will be clearance issues i just wont lower it but werent the bosses lower? i dont know. any help would be greatly appreciated. THanks