project: 3/4 ton dropped

[79 blue monster]

my plans for tubbing the box. im going to cut out the first section to the dotted line, then cut out the next section to the solid line. then im gonna take the first section and slide it back into the place where the 2nd section was. should give me about 2 more inches of room. anything bigger i would have to move my leafs to the inside of my frame and i dont want to do that right now.


what is the width from mounting to mounting, of a cab chassis truck rearend, and mine(14 bolt) because if the cab chassis rearend is narrower, i'll just throw one of them under it, and fit a deeper dish rim. can i use a dually axle as a single?