QF GE powered B767-300 will probably sell well, though would being the lightweight version reduce the conversion potential
All QF GE 767-300 are heavy weights. I think QF only payed for only 5 to be operating at max weigh at any one time. When they did operate the placard at the back of the cockpit door was changed to max weight and a hold item in the tech log to say it was a max weight a/c.