Re: Towing capacity - F250-4x4-7.3 powerstroke
13k pounds is getting pretty heavy as far as tongue weight goes, but the truck will do it. A Class V hitch is rated for 14k lbs, and a 1400lb tongue weight. That being said, 13k pounds is totally possible with our trucks. I would make a few suggestions.
One - convert to a gooseneck if possible. Much safer, and you can haul heavier loads. I've hauled some absolutely RIDICULOUS stuff with my truck and a gooseneck. PM me for details.
Two - if you're going to be pulling frequently, airbag your back end. You can do it for $250-300 through sponsors on this site, and around $500-600 if you want to have onboard air instead of just relying on gas stations or your shop compressor. On board air is nice to have, so I think it's a worthwhile add-on, especially for a work truck.
Three - a good trailer brake controller. Pick your poison on these, I don't really have a preference.
Four - Consider an exhaust brake. If you're hauling, get a REAL exhaust brake (US Gear, BD, Pac, etc). I've got a US Gear and have been VERY happy with it. Big advantage to a US Gear is you can put it on different size exhausts...so if you upgrade your exhaust later, you can get the fittings from USG to mate up your brake to the new exhaust.
If you decide you're going to want more towing power, don't skimp, make sure you get gauges when you do the power mods (chip, programmer, etc). I'm partial to Jody Tipton for chips, he's done me well, but there are plenty of other options through our sponsors. You may end up having to do exhaust and intake at the same time, 'cause the truck will get hotter EGTs while towing; just bear this in mind when upgrading.
I've done a lot of hauling with my truck, and have found it to be very comfy and reliable. Only problem is, to pull a mountain - you need two PSDs.
2000 250 PSD CC LB 3.73 4x4 6spd XLT Bright Red. Rickson 19.5s and Goodyear G124s, Performance Friction rotors and pads, GTP38R turbo, Thomas compressor with 5gal tank and 150/110 switch, Air Horns, Sony MD/6CD-MP3/XM & Components all around, Brown Bread soundproofing, USGear brake on 4" Magnaflow, ScorpionLiner, TransferFlow 30gal box, F350 springs 4" blocks and Firestone air bags rear, Rancho level kit up front, DiamondHitch gooseneck, Isspro, Husky Liners, Weather Tech, aFe ProGuard intake, Donnelley auto dimming mirror w/temp, Zerostart, Fumoto, 203 stat, Stanadyne Blue in every tank, Yaesu FT-857D and ATAS 120 with remote mount kit, 1.25kw Inverter under rear seat, Optima redtops with extra studs, Luxeon LED interior lights, Jody Tipton's 40/80/120/high idle flip chip WOOHOO!!!