The one pictured in the LMC catalog is the gasser setup. Those swaybars mount to the frame via a crossmember that runs from framerail to framerail right below the radiator support. Because the crossmember is mostly flat and the swaybar bushings sit pretty much on the same level as the bottom of the framerails, the bar itself has to bend down first to go under the leaf springs, before it can bend rearwards (forming the arms/wings) to reach the axle.
Diesel radiators hang much lower than gassers, making a gasser crossmember unusable on a diesel truck as it has to occupy the same space as its rad support. Thus I'm thinking diesel trucks would require some sort of drop mounts to for the swaybar to clear the low-hanging radiator. At which point a gasser bar that already bends down to clear the leafs would end up too low and try to hang up on stuff... That's why I'm asking for a pic of the swaybar in that area in addition to just the numbers, I'm interested in how the factory went around the low-hanging diesel radiators without sacrificing ground clearance - it looks like a low-mounted (cause of the rad) swaybar won't have to drop to clear the leafs like the gasser does, but instead can be mostly straight/flat in the center section and still pass under the leafs, after which it can just bend aft towards the axle...
But that's just a guess, as I've never seen a diesel F250 4x4 swaybar, just the gasser one. If anyone is interested, here are the numbers for a gasser swaybar, IIRC that truck was a super-cab with a D50 front axle:
- diameter 1"
- length of arms/wings 17"
- drop from center section to clear under leafs 4"