You can set the points at .025 and it will be fine. J6C or J4C Plugs will
be good. Older plug equivalents are J6J or J4J. (I have about 4 HD 25
engines).

I know of no where on the net to download a manual however the Antique
Outboard club's members often have manuals they might copy for you.
Go to www.aomci.org

Don Dando