[49fordv8f4]

The Ford script bed was used until about '57-'58 when they went to the block letter style. My '49 f4 has a 9' script bed. The 9' foot beds were used on the 134" wheelbase trucks and the 12' beds on the 157" wheelbase trucks. You bed would be correct for a 157" wheelbase Ford from the late 30's to about 1956.
Your bed looks very restorable and looks like you also have the stakes, which are usually missing and can be hard to come by. My back panel was damaged so badly I had to replace it. Yours looks very straight.
Mark