Slant/Fin 78 series boiler info?

Steamhead

Just looked at one of these today, a 78-280 - owner won't be replacing it any time soon, so I'm looking for anything I can find on it.... manual, what kind of chamber it takes, etc. before we get into it. Currently has a newish Beckett AF, but Beckett's OEM guide doesn't go that high. If you Google the 78 series, it shows it came with a Wayne burner.



This might be one of those boilers that carried over when Crane sold their boiler operation to Slant/Fin.



Thanks in advance.



EDIT- found it, and it came with a Sunray burner too.