Re: shackel flip questons
You can use any spring hanger that'll take a 3" wide leaf. Norm is partially right, but IME the F150/Bronco hangers are not as long, so plan on maybe 4" lift instead of the 5-6" with F250 hangers. Look closely and I think you'll find 1/2t hangers have a total of 4 rivets while 3/4 and 1t have 6 per hanger.
Dave, I know we've beat this to death before, but I never got the answer I wanted: from what year F250 did your packs come, and how many leafs are in each pack? It's the main leaf that gets WORKED with the flip, so if you don't have a leaf under it which is nearly as long, plan on it fatiguing with time.
Like I've said, most F250 packs from the '80s and '90s were the same as Bronco packs, they just gave 'em a thicker overload at the very bottom (also the shortest leaf). There are several variations, tho
Once you do it, give it a couple weeks to settle, it'll sit high at first as the springs try to maintain their arch