Ha ha the idea of the USA getting 1,763 F-35As is just not going to happen. They will be lucky to get 763!!!!! I can imagine them having something like 500 or 600 or so. The navy and marines will end up with far less to.
Even by retiring legacy aircraft now the cost is going to be to great to buy so many F-35s. Also once there is another round or two of BRAC cuts there will be a lot less bases and fighter wings.
I remember when the USAF wanted 700 or so F-22s, then it was 380 and in the end they got 180!