Thanks very much Mike, appreciate it.
I finally found some of my resource material which confirms what you said:
Base 400/350 Auto - Heads 9790118 #16, Cam 9779067-P.
Base 400/350 Manual - Heads 9795043 #48, Cam 9779068-S.
Ram Air III - Heads 9795043 #48, Cam 9785744-H (up to engine serial number 709185) then 9779068-S.
Think I will ask for a Labatt's Blue
