Good work DirtySotuh, just a little more info to add since I get this alot too.
Like DirtsySouth mentioned your prime axle choice would probably be a 78-79 Ford Dana 60. It can be found in all F-350 and a certain special packaged F-250's. Its is high pinion, king pin,has a spring pad width of 32.5", and uses the standard 8x6.5" bolt pattern. It is similar to the 86-91 F-350 front axles except that the springs are inboard 2" which helps eliminate tire rub on the leaf spring at full steering lock. The advantage to high pinion is increased driveline angle (around 3.5" above a standard cut pinion) and around a 20% increase in ring and pinion strength.
Next would be an 86-97 Dana 60 from an F-350. They are all high pinion with a 36.5" spring pad width and 8x6.5" bolt pattern. From 86-91 they used king pins and in 92 changed to the ball joint style. The king pin style is the more desired because it is usually cheaper and easier to do steering, as well as stronger. With a ball joint style you either need a custom knuckle (ORU, Dynatrac) or machining on the knuckle to accept studs for a steering arm.
If you dont want the strength increases from a Dana 60 (or the price that comes with it) there is always a Dana 44 or Dana 50 front axle. The most desirable Dana 44 would be from 77-79 F-250 because they are high pinion. pre 77 ford Truck Dana 44's will also work but the are "low pinion" aka straight cut axles. The Dana 50 axle can be found in 99-2002 F-250 and F-350 SRW (single rear wheel) trucks. They are not very desirable because they use a 8x170mm bolt pattern unlike the common 8x6.5.
All the previous axle mentioned Can be used with the stock transfer case but most use 8x6.5" bolt pattern. If you want to run the standard chevy/toyota 6x5.5" and keep your stock T-case (drivers side) your choices are Custom dana 60 parts or Run a hybrid Ford/Chevy Dana 44. This involves getting the parts from the knuckle out on a 6 lug Chevy Dana 44 or 10 bolt and swapping them to your Ford Dana 44. There may be variations in axles for certain years so I don't know the exact years which will exchange. This option is not really desirable IMO.
Here is my price list. This contains pretty much eveyr penny I spent. Many people will say "holy **** thats too much" but don't try to base this as a price of an SFA swap or even an average price. There is many places I look back and could have saved a lot. The only labor a shop did was the fabrication and install of the custom brackets. There is too many factors to make a base price for any SFA swap, it can range from 2k backyard fab/parts laying around type job to 18K ORU suburban. It all depends on what parts you want to you use and what price you get them at, what type of work you are able to do yourself, etc...
Dana 60 front : 900.00
14 bolt: 50.00
Brackets(custom and welded),Brake lines, labor: 1,000.00
Pro-Comp shock hoops: 250.00
Front leaf springs 8” skyjacker: 273.90
Rear leaf springs 5.5” skyjacker : 479.90
Front driveline: 350.00
38x16x16.5 Swamper TSL’s: 1,475.00
16.5 x12 eagle alloys:
Off Road Design shackle flip: 150.00
Crossover Steering System: 950.00
Brake parts: 160.96
Rear gear change: 616.95
Front gear change:616.95
Shock mounts: 19.12
Spring pads: 16.20
1310/1350 U-joint: 35.88
D60 U-joints: 103.42
1350 cv front shaft: 350.00
T-case Yoke: 75.00
1330/1350 U-joint: 34.00
Exhaust Modification: 41.00
Cross member Modification: 25.00