As a Ford 6.2 owner for over 4 years and 35000 miles I have nothing to say but good things about it. The only problem I had with it was not going in to 4X4 with the electric switch. The Dealer cleaned and serviced the electric vacuum pump that actuates the 4X4 and all is good. No, I was not stranded. Ford also has manual hubs in case the electrics fail.
A 6.2 with 430 gears would be a beast!! JMHO
I am seriously considering re-gearing to 410. Currently have 373 but with the 35" tires more like 355. If I got 410 gears I could go to 37" tires to put me back at 373!!