Vacuum advance information and myths

Keep an eye on Mancini's literature section. They sell the MP engine manuals CHEAP when they have them.
I don’t want to get off topic here, but can you tell me which manuals are the ones you’re referring to? I’ve done some searches, and there are quite a few Mopar engine books available. Are there books published by Mopar that I can get, or just the ones I’ve found that don’t seem to come straight from Mopar and are written by other folks? Here are some I’ve found:
0CE170F9-3741-43E2-B2A1-D2F6E6F4D96E.jpeg

2BD03102-D53C-4C5A-A748-30A49047380C.jpeg

34BD2603-A32B-4FD5-A7FE-CA855D753642.jpeg