It amazes me that manuals of old sets do not have a list of the parts needed instead of "spot the differences" and good luck. not even highlighting the new parts. :
Old LEGO® Instructions | letsbuilditagain.com
LEGO® Classic toys - Free building instructions | Official LEGO® Shop US
Old LEGO® Instructions | Lego bauanleitung, Lego design, Lego produkte
Old Instructions - Your online source of Lego instructions, catalogues and ideas books from years pastOld Instructions | Your online source of Lego instructions, catalogues and ideas books from years past
Old LEGO® Instructions | Vintage lego, Lego, Lego house
Old LEGO® Instructions | Lego instructions, Lego activities, Lego hobby