3:73 or 4:10 LSD very common option?
 

I would like to re gear my truck for more pulling power for pulling my travel trailer and hauling ass. I currently have a 3:55 open diff. and I barely get enough traction to pull the trailer up my gravel driveway. I found another 3:55 LSD for $215 for the whole rear end. Was the 3:73 or 4:10 LSD very common? I would like to just bolt in the whole rear end. Anyone here have one of these?

1994 F150 XLT ext cab 2wd
5.0 stock
Automatic
Free flowing cat back
245/75-16 bfg a/t

3.73 is axle code B6 so they came with them, can't find an axle code for 4.10's anywhere for the F150, rangers have a code F7 for LS 4.10. I've also heard of bronco's coming factory 4.10 but can't be sure.