‘Great answers here!
I’m kind of funny about power upgrades & probably in the minority here, but I decided to leave my ‘13 F-350 dually bone stock. I was more concerned with longevity & warranty than any additional horsepower & torque. I think that I’ve towed our 16,400 pound 5th wheel over almost every mountain pass in the western US & I don’t think that I’ve had my foot to the floor yet. Having said that, I would possibly consider deletes & upgrades now that my extended warranty has expired, but only if I experienced some kind of major failure & had to get into the engine for repairs. We’ll see.
Be careful about getting larger tires. Be sure that the diameter of the new tire is the same as or very close to the stock tires. Larger diameter tires will affect towing & hauling in a bad way thus negating your goal of towing/hauling ability. I suggest that you & everyone else here read my article, “Tires for Towable RVs & Tow Vehicles” which is published on www.thisoldcampsite.com
Also, air bags are wonderful for leveling your load. DO NOT fool with air shocks! Shocks are not designed to be a load bearing component. My Firestone Ride Rite air bags do a wonderful job of leveling out my truck while towing.
Good luck & let us know how this all works out for you.
2013 F-350 Lariat 6.7 L PSD Crew Cab Dually, FX4, white platinum metalic tri-coat with black interior, N-Fab step bars, factory spray-in bedliner and 5th wheel hitch, trailer tow package, integrated brake controller, upfitter switches, Sync with My Ford Touch, memory group, remote start, reverse sensing with rear view camera, nav, satillite radio, Weather Tech floor mats, limited slip diff, moon roof, climate controlled seats, engine block heater and tailgate step.
2014 Lifestyle (formerly Carriage) 5th wheel 38' long with 3 slides & all the goodies.
SOLD: 2005 F-350 Lariat, 6.0 PSD, Torqueshift auto trans, crew cab, SRW, short box, FX4, ESOF, limited slip dif., tow command, upfitter switches, 6 CD changer, Lariat Lux. package, camper package, engine block heater, triple A-pillar gauge set (Autometer) with pyrometer, trans temp & voltmeter, MBRP 4" cat back exhaust w/5" dual wall chrome tip, dark shadow gray/ med. flint interior.