Also see: Truck Floor Part Numbers
The rear floor is the bottom of the tray (cargo well). The supporting structure (side members and cross members) are also part of the floor.
REAR FLOOR PANEL is the tray/bed bottom. All years the same.
74502-G1001 PANEL-floor, rear SB 74502-G1400 PANEL-floor, rear LB
33 BACK PANEL forms the rear of the cabin
Access Panel (Hole Cover)
Long Body is mostly the same as Short Body except it has one extra crossmember and of course longer side members and floor.
Rear Side Member with Spring Bracket attached
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