If you were, it all came down

[suprunp]

If you were to unravel exactly where the Captain’s job, which was to do his job, actually began, then it all came down at last to this piece of paper that had been issued to him by his immediate superior long ago.
(The Ultimate Hitchhiker's Guide to the Galaxy; Douglas Adams)

Why not "If you were to [...], then it all would come down [...]"?

Thanks.

[waflob]

If you were to unravel exactly where the Captain’s job, which was to do his job, actually began, then it all came down at last to this piece of paper that had been issued to him by his immediate superior long ago.
(The Ultimate Hitchhiker's Guide to the Galaxy; Douglas Adams)

Why not "If you were to [...], then it would all come down [...]"?

Thanks.

Apart from a slight change of word order, I tend to agree with you. However, we're talking about Douglas Adams here

It is known that he spent large amounts of time revising short phrases and sentences, often re-writing them many times, in order to get exactly what he wanted.