You are definitely right about the proposal not sharing anything in common with the PB2Y. For instance, the cockpit looks more like that of one of the 100-passenger flying boat designs by Consolidated than the PB2Y's cockpit, while the engines are liquid cooled inlines, not radials.Dear Hesham,
Although this is an interesting find,this large flying boat concept
haves not much in common with the PB2Y.
It's one of the several proposals ,made by Consolidated (4 and 6 engined designs)
along with other manufactures -Boeing,Sikorsky,Douglas-for a large
North Atlantic crossing passenger aircraft on the request of PanAm.