The main issue with the F250's is that they have leaf springs and TTB's. And those things don't work well together since the TTB's work in an arc so are trying to twist the leaf springs - and they do NOT want to twist.
So if you want reasonable ride I believe you have only two choices:
TTB and coil springs
Solid axle and leaf springs
I had 1" of compression on Big Blue before the suspension hit the bump stops when I had TTB's and leaf springs. One whole inch! So the suspension had to be extremely stiff.
Now, with the D60 swap, I have 4" of travel when sitting on the ground, and a full 8" of articulation. And the ride is dramatically improved.
As for coil springs, I've read that people are now starting to use the coil spring suspensions from recent F250's in earlier trucks. But I don't know what is required to do that. Nor do I know if a kit is available.
Gary, AKA "Gary fellow":
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Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI