I have seen 727-100's in both a 7 pallet and an 8 pallet configuration. I am not sure But I belive that Northern Air Cargo removed the aft lavs out of their -100's and gained an additional pallet space, but they don't use containers, just a flat spot for wooden shrink wrapped pallets.
The 7 pallet 727 was Reeve's combi. In that case they moved to forward galled all the way to the back. this made space for igloos forward but they had to give up a position in the back for the freighter.
Alaska Airlines 737-200QC's are run in up to six pallet configuration.
OBAMA-WORST PRESIDENT EVER....Even SKOORB would be better.