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THe vehicle and year model would be helpful to decode your numbers. If it's an 80-96 4wd Ford with the twin i-beam front axle, then it will be a DANA44, and the gear ratio would be 3.54 to match the 3.55 gears in the rear axle (Ford 8.8"). Try the search feature here, or a google search for DANA axle I.D. Some shop manuals and parts catalogs will also help you to ID an axle.
Sorry about the lack of info. The truck is a 1985 F-250 with a 460 and C6. I am pretty sure it is a Dana 44 (it is ttb not solid axle) but I am wondering if it is the HD model. The rear axle on my truck is an Dana 70.
Then it's probably a Dana50 TTB on the 3/4 ton, but it still has a 3.54 gear ratio. The half-tons (F-150) have the D44 TTB. The bottom row of numbers that start with a 6 can be used for ID, it's a "Bill of Materials" number that's used for parts that fit that particular axle.