Compression Ignition Addict
Join Date: Dec 2008
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I've had great luck with 6.4s, much better than 6.0s lol. They aren't that hard to work on, just intimidating with everything that's stuffed under the hood. Contrary to popular belief, the cab doesn't have to come off for anything. Does it make it easier, yes, but necessary, no. It will have more power than the 6.7, but the biggest thing you will notice is a mpg drop. I rarely saw anything more than 14, with multiple different set ups. It reall comes down to what you want to do with the truck. I haven't been around the 6.7s much, but I would say as far as reliability, it probably a wash at 500hp. Anything more than that the 6.4 will hold up better.
2010 F-250 CCSB, Black Maxx w/ MCC, MPD S472, AFE Stage 2, Dirty Diesel CAC
Dirty Diesel EGR Delete, 5" Exhaust, 4" Down Pipe, Daystar Leveling Kit
20x12 Fuel Hostages, 35/12.5/20 MTZs, Custom Traction Bars, Custom Axle Blocks, Custom ALAs.