Nope..

I may be muddying the water but the best you can do is determine if the engine (and various parts for that matter) is "period correct" and configured correctly for your 77 F250 (and for how it was optioned).

For example, if the build date is 1977, then engineering ID numbers (up to D7Tx-xxxx) cast, labeled, or tagged on various parts/harnesses is accurate. Even then, some parts were not re-engineered and may be cast, labeled, or tagged with D3, D4, D5, and D6 for the entire production run of this series.

Are you trying to determine originality or determine what you are working with???