On E-Bay boat parts, under "detroit Diesel", a set of tune up tools is available at
http://cgi.ebay.com/ebaymotors/DETRO...QQcmdZViewItem
I don't know enough to know which engines these are for nor whether it's a complete set nor what the regular cost would be...If anybody knows and can post here it might assist another owner to aquire a set...
Note: Just noticed this is for series 60 engines..