I got a re-pro shop manual on eBay and it has both answered and posed questions. It is for '51 &'52. The truck thi came from was registered as a '52. It has really detailed rebuild info and some really dated service tips. To check the hydraulic lifters you suck on them and put your tongue over the hole. If they stick to your tongue they are OK! To dispose of old sodium filled valves you burry them. My engine according to this book can only be as large as 376.98 ci. 4" bore and 5" stroke as opposed to 4 1/16 X 5 3/16 which isn't 413 ci any way. My engine has no number where the book says it should be (only a small C on a small oval boss) and the book makes no mention of the aluminum plate on my engine or a model 22A. Could this be a factory replacement? It was not something thrown in from a wrecking yard. There was no evidence that any of the attachments had ever been messed with except for the tach.
