Originally Posted by ratmonkey
use the ford arms for a long arm, re-tube the axle, or find a 78-79 f250 hp44, or 1976-1977 150 axle.
Using the Ford radius arms is probably the best option for that
front axle, but it's a half-assed fix if you ask me. Re-tubing it is going to cost more than a HP44 is worth, if you do it right.
Getting a HP44 from a '78-'79 F250 or '72
-'76 F100/150, or '78-'79 F150 crew cab is your best options for a HP44. '72-'75 came with drum brake style knuckles, but thats not an issue if you plan on switching to Chevy flat tops, or disc brake style Ford knuckles are easy to come by. I would try to shy away from the '77's, from '72 to mid year '77 the F100/150 HP44 came with 2 3/4"x1/2" wall axle tubes, after that they changed to 3/8" wall.
'78/'79 F250 and F150 Crew Cabs were very close to the same axle, both used the 3"x1/2" wall axle tubes and leaf springs, but the F250 used 8 lug knuckles and the F150 Crew Cab used the 5-5.5" knuckles that the rest of the 1/2 ton trucks used.