You might take a look at KO4NR's web pageshttp://www.geocities.com/ko4nrbs/
He has some pictures of the inside of the AL80 that he got from W7RY. If nothing else maybe you can backtrack and see if he has a manual or schematic for you. W7RY has a website but no info there.
Hams are always willing to share. I got a schematic from Bill for converting my old SB1000 to a dedicated 6 meter amp.