77 F-250 Front Axle ID

Hi Guy's,
I'm in the process of purchasing a 77 F250 so called "Highboy" RHD built crew cab pickup version . Anyway, I have been given details off the front and rear axles and I just can't match the front axle BOM numbers to any Dana etc. reference.

The rear axle BOM Number is: 4.1 D6TA 603717-11
From my reference to the Dana information the rear axle is a Dana 60, 76-77 F-250 3/4 Ton HD Pick-up Full-Float etc.

The front axle BOM Number is: ED2 D6TD BE 610007 3R 4 09
The closest reference I have found is BOM Number: 610008-1 Standard 4.10 Dana 60, 610008-2 Standard 4.10 Dana 60, 610008-4 Trak-Lok 4.10 Dana 60, which are all front axles from a 1977 F-250 Crew Cab Pick-up.

Can anyone shed some light on the axle I most likely have working off the BOM numbers and/or experience with these trucks?
Cheers,
Mark

Dana 44-6CF front driving axle / 4.09-1 / 3,500 lbs. axle capacity / No free running hubs, no Limited Slip