OK here goes- 56 Ford- Number located on left front door pillar.
The number consists of: An engine code letter, a model year, an asembly plant code letter, a body style code letter, a six figure consecutive unit number, in the order giver.
The engine dode letter:
6 cyl. OHV 223cu. in.- A
V8 OHV 272 cu. in. - U
V8 OHV 292 cu. in. - M
V8 OHV 312 cu. in. - P
The Model year code for 56- 6
The only other info I have is F is Dearborn plant and H is a Thunderbird. Maybe this will give you a start.