My 2.3 L,5spd equipped with Firestone 3000# air bags , 8.8 4.10LSD,standard oem clutch, 30x9.50/15LT tires pulling 6x12 1200 lb trailer. Truck had 1800 lbs on it & trailer had 3200 lbs . So total hauled was 6200 lbs I also towed my 28ft camp trailer when I moved 42 miles away.
Its a 94 long bed 2wd lifted 5.5" with 2003 front end & power dome hood,2007 mirrors & 258,495 miles on original engine with out any smoking or using any extra oil between oil changes @ 7500 mile changes
Several years ago I had a 76 F250 4wd with 1 ton suspension, D70 rear D60 front, 2 ft side boards including front & back panels. I had 6.53tons of 5/8 gravel on it. Made 2 loads with it. On 2nd load broke a rear universal joint at diff. yoke. Pulled driveline & locked up front hubs to travel 5 more miles. Front tires spun on leaving traffic lights & each time I shifted gears.