Clicky.

That chart shows a 2013 F250-F550 last-order date of 5/24/13. That's 3 months earlier than the same last year. Correspondingly, Ford is accepting orders for 2014s 3 months earlier than the same-period last year, 5/14/13.

I'd say within a few weeks we should see some Ford Order Guides appearing on the net to answer the engine availability questions. I'm hoping for something more than the 6.2L.