Corvette Central has the answer for rusted, rotted floor pans in '76-'77 Corvettes. Original panels were susceptible to damage from road salt on the outside and from water leaking into the inside.
Now available is a reproduction of the metalfloor pans. Original floors were one piece from side to side with separate side extensions that went up over the frame. Replacements come as separate left and right side and allow you to retain your original transmission and drive shaft tunnel section. Replacements weld in place at the sides and rear, and rivet in place at the front as originals. The new panels cover all applications from 76 -77. They include seat mounting weld nuts and plates. Make your floor sound and dry with these reproductions.
For 1978 -1982 use part # 183013 (L or R)