a body rack and pinion

RP57,i see you used the rear mount of the factory k frame,and made the rest of a new k from there.Thats kinda what ive been thinking about doing also.Must question to everyone is,why hasnt anybody mounted a rack in the rear of the k frame,and modified a truck oil pan to clear it?or modified a car pan to clear it.I guess ive got to get my car on the lift at work,and make some measurements.I know header clearance will be an issue,but the rack is stationary,so that will help some.