What do you mean by close?
It had to be the exact same width (outside), and length. Height was determined by suspension. Taper on the front of the frame was necessity. Crossmembers went in different spots though.
So - it is the same frame, just that the rails are narrow (wider space between frame rails than stock), are box steel, and straight and NOT RUSTY!
And the body fits - so we must have done something correct!
- Ryan