The drop pans usually do cut out the minor chassis member that runs front to aft near the tunnel. Just the section from the rear bulkhead to the center cross member, otherwise you are extremely limited to fitting a very narrow seat in the dropped area.
I just made my own drop floor pans and installed. It really isn't that difficult and beats $300 each from the vendors. Cost $79 for a 4' x 10' sheet of 18Ga cold rolled steel.
Julian
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