the highboys frame was a carryover f350 frame from bump sides that ford used for the 250's rather than waste. in 77 fords stopped and went to a universal frame. the divorced transfer case in the f250's driveshaft angle needed them to sit higher, therefore needing a taller block in the rear to compensate for the higher front end. any divorced case dent side is a highboy so its a generic term. the 1-ton frame was narrower for commercial applications requiring a narrowed frame for better compatibility. it was beefier. later trucks went to a married case and lowered hight.


to see if any header fits check its part number and see if its the same for the 67 -72 f350's with the same engine. that's all that the frames were.

 

What engine are you running? FE? 335 series?

 

 

 

Curious also, my long tubes on the drivers side were a pain to install, curious to see where these sit for exit...

 

On Ebay? No.

However, Sanderson FE shortys (PN FF427) fit perfectly

 

x2 for Sanderson FF427. That is what I am running.