Thread: Need help with 3” channeled Model A Sedan subfloor

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You don't have any exhaust in there yet either. Are they going to run the exhaust out the back, use zoomies , or dump in front of the rear tire... Short of that I would have the rear sitting on the bump stops or remove the shocks and install some tubing in the shocks place to simulate the highest position the diff can travel in the chassis. Then fabricate body sub floor rails and cross bracing channels that fit just above the highest suspension pickup points. You could also make the floor pans lower than the highest pickup points, but you will have to build bulges for your floor pans where the higher pickup points are located. My car isn't channeled but when I back halved it, I fabricated body sub rails that followed the chassis out of 2 x 3 rectangular tube cut in half to make "C" channel and welded another piece of flat stock to the bottom almost like the original rails.