A few cargo carriers from the past:
Kai Tak 1976; Air France 707, Alitalia DC8, British Airways 707, Cargolux DC8, Flying Tigers 747, Flying Tigers DC8, Japan Air Lines DC8, Lufthansa 707, Northwest Orient 747, Philipines Aerotransport L100
LHR 1977/8; Seaboard World 747, Guppy (unidentified - far side of airport), ABC Argosy
Hope these are of interest.
Air France cargo 707 F-BYCW by
Ian Pursey, on Flickr
Alitalia DC8 cargo by
Ian Pursey, on Flickr
BA Cargo 707 by
Ian Pursey, on Flickr
Cargolux DC8 by
Ian Pursey, on Flickr
Flying Tigers 747 by
Ian Pursey, on Flickr
Flying Tigers DC8 by
Ian Pursey, on Flickr
JAL Cargo DC8 by
Ian Pursey, on Flickr
Lufthansa Cargo 707 by
Ian Pursey, on Flickr
NWO Cargo 747 by
Ian Pursey, on Flickr
RPC100 by
Ian Pursey, on Flickr
Seaboard 747 by
Ian Pursey, on Flickr
Guppy by
Ian Pursey, on Flickr
Argosy by
Ian Pursey, on Flickr