I have a 97 F150 supercab 4x4 4.6 with some mods, headers,exhaust, K+N filter, superchip, I pull a dry 4600lbs boat so technically I am probably right at the limit for my truck, I currently run 265 75 16 with 355 gears, Since I do a bit of towing I would like rear disc brakes so I thought I would start looking in the junkyards for a rear end with disc brakes, my question is do any of the newer trucks come with 410 gearing or would i have to change front and rear if wanted?? I ask because I would like a bit more gear for highway pulling.

 

You would have to gear the front and rear axle if you want new gears. Ford didn't offer 4.10s in F150s in 97-03. I think it was an option in the 7700lb or F250LD, but they don't use the same rear axle as your truck.