Check the options on the HD. My custom came with plow prep package which is heavy torsion bars, skid plate, alternator upgrade and the hidden pigtail for a strobe in the break light spoiler. Also came with tow package and bed liner. Most customs I've seen have those options, if not all of them. Still get the folding mirrors and back up/line up cameras. The 6.2 and 6.6 are essentially the same engine, so they have suffered similar bulletins with the valve train. The 6.2 uses higher compression pistons reducing displacement. The 6.6 has a beefed up iron block for durability under load. The 6.6 won't be able to be tuned like a Camero, but it's no slouch. The programming is set up to provide power under load. The shifting of the beefed up 6 speed is smooth and it holds gear up grades nicely, rather than down shifting and launching you when you crest the hill. Mileage can suck if you're messing around. But when taking it easy it's not so bad considering the truck is a good ton heavier than the 1500.