On my 1974 f-100 4x4, I wanted to know if my suspension was stock. I don't know much about the truck, I never got a chance to talk to the owner. It has been lifted, It has coil springs up front, and the springs in the back. The springs in the back are 3" wide, and there are 5 of them. I thought I read somewhere that f-100 springs where 2 1/2" wide?? What can I look for to tell if the susp was beefed up from stock?? Front and back