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There are a TON of posts on the subject. It's loosely used for the 73-77 4x4 F250s, but the term actually is meant to tell the difference between the 77 & 77.5 trucks. The latter of which has the negative arch leaf springs, making it sit around 4 inches lower.
It not being a factory term, it's all open to interpretation, but the folks who have a TRUE highboy (early 77 F250 4x4) are very particular about what is called a highboy. The term couldn't have existed until the 77.5 trucks came around, as everything beforehand was just a 4x4 F250. The bump-side (67-72) trucks have no involvement in the highboy/lowboy talk.
Highboy is used many times as a selling point for old 4x4 Fords. The same as the 351m becomes a Cleveland and the 360 is suddenly a 390 at selling time.
To name just a few of the easier to spot differences, a highboy will have no less then three drive shafts underneath and a crossmember under the front bumper.
Well, I'm not a 4x4 owner and I never have had one(though I wish I did), but in my opinion to which is better to have(72 or 73) depends on your prefernce of body style(bumpside or dentside), so its entirely up to you. Me personally would have the 73, as I prefer dentsides to everything else.
I have a 77 highboy... and yes it has a divorced transfer case and the whole 9 yards. The part i dont know is... it has a gas tank behind the seat and a door for a tank on the bedside on the driver read, but no tank under the truck. What happened, no one seams to know???
i have a 77 highboy. gas tank behind the seat, and a door for a tank on the driver side rear, but no tank underneath. no one seams to know where the tank originally goes on this truck, can you help??
i have a 77 highboy. gas tank behind the seat, and a door for a tank on the driver side rear, but no tank underneath. no one seams to know where the tank originally goes on this truck, can you help??
That's a dummy door...can't remember why Ford did it...but I only recall it being on 77's.
No...because it can be Googled just as easily, and Wikipedia has a really nice write-up on F-Series trucks from the first generation to the latest. Wikipedia isn't an "official" source, but there's enough information available from a simple Google search to answer the question instead of posting the same question over and over here.