The HP D60 being referred to as "flipped" is a mis-nomer and misleading. It is actually a completely different axle. If you just flipped a D60 you would have oiling problems and gears would be messed up since you are now riding on the "wrong" side of the gears. Also, I believe some F250s also had D60 fronts. Not many, but I thought some of them did. I could be wrong there.

I was not aware that the HD springs, like on Camper Specials had different ride heights from the factory. My guess is that over the years these springs have less sag and do indeed appear higher now. Again, I could be wrong, just a guess. Finally, the "second" set of rear springs does nothing to add lift. They are what make up part of the HD package, like on CS's. They are an overide spring only so you don't bottom out your main springs.

 

So, will the pumpkin on the D60 still be on the left side of the truck?

 

The pumpkin never changed sides. If you find one on the other side it is a non Ford.
Several buddies and I were driving 4x4s way before it was cool. We were the first young guys driving 4x4s and made the first tracks in the badlands where everyone fourbys now. We all had highboys mostly and I have to say you could spot the light duty suspension a mile away because the rear end sagged. This was 1974 and the trucks were new or only a couple years old. I don't remember the exact GVW but the lighter ones were in the 6000 range, I think 6800. And there were very few camper special highboys ever made. I have heard of a couple 69s and one guy said he bought his new. My first highboy was a 74 and there were warnings in the owners manual and on inside the glovebox door that the pickup was not suitable for slide in camper installation.
You could special order the 60 in an F-250. The "flipped" term is just a term some people use to describe the axle because it looks upside down. It is not intended to be a technical desrciption. I prefer the term "reverse rotation" Had they just flipped the diff and not reversed the rotation by useing diferent gears you would have both ends of your truck trying to go opposite directions. And the pumpkin would be on the wrong side. Plus the afore mentioned lubrication problems

 

How do you tell if the truck is a highboy model. I have a 72 f250 4x4 fe 360 4 spd and 16 split rims. Has anyone put that 4in lift from skyjacker on their truck, how is the ride vs the stock setup.

 

All the f-250 4x4s from 67 to mid 77 are considered highboys. I guess the older ones could be too.