Well, theoretically you could, as the freighter variant runs with a max. payload of approx. 40t (at a 100 kgs per pax = 400 pax). but I doubt that they would find it comfortable being palletized!!!
.
Door limitation is 279, but then your Range goes down the drain. Also it is not very easy to find a 164-Version these days (referring to MTOW!!!) that wants to be sold.
Oh, and a slight correction: the A310 does only have 2-man cockpit. Some early versions of te A300s have 3 man required, but the A310 was built form scratch with 2 guys in the front office. Airbus later integrated the A310 cockpit into the A300-600.
Guv
I just hope you'll be able to make it work. As discussed before, I doubt that the TriStar will work, but we never want to forget that Air Atlantic (formerly Atlantique, much nicer name) operates a bunch of vey old aircraft wuite successfully.
My three-holer has no s-duct at the end!