It is all boxed in along with the torque box. Yours appears to be missing due to cancer.
Page 14-15 Figure 5 in the 61 factory shop manual has a pretty good representation of what is supposed to be there.
Purchase a manual or a body assembly book as a guide. You need to replace all the reinforcement that is missing.
Here is a shot of the rear of the cab on a 63
Here is a shot of the bottom of a long bed torque box
Here is the additional reinforcement between the bedside and the Torque box stamping
98 528I BMW
64 F100 "Christine II" 390 NP435 6" lifted 2 wheel drive
63 F100 Uni Custom under construction 4" off the pavement and built to drive.
69 M250 Crew Hiboy 472 C6 Ranger, getting a full rebuild.
Last edited by garbz2; 11-29-2011 at 01:53 PM.
Reason: Added Pictures
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company.