Has anyone used the factory roll bar from the 70's K5s in there 80s ones? i have a buddy who i can get one off of for very cheap, and i looked at it today and fit it up. my plan was to turn it around, so the bar goes right around the end of the cab, similar to the smittybilt ones. it only looks like id need to extend the back pipe 4 or 5 inches. has anyone done this before?