Help me identify my rear-end

[markreed]

Just trying to figure out what all the pieces on this truck are...

Motor is a ~70 350 SBO
Heads are #6 from 1970
Trans is a TH400

Rear End- ????? It is a ten bolt (that is ten visible bolts)
Looks to be original leaf springs, with aftermarket coilovers
Also 6 lug

Truck is a 64 GMC 1000 series...original 6 cylinder



Edit:
Just looking at the picture and noticed some kind of numbers in the top right of that...Ill see if I can decipher those...Any help is welcomed!!!

[markreed]

Also found another picture with a 44 stamp...Dana 44?

[GMC66]

That is correct, Dana 44.
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[markreed]

Any clue on gear ratio?

[GMC66]

Mine is 3:54, yours is probably the same since we have the same engine/trans combo. No tag on the cover?
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[markreed]

I just had ankle surgery, so I made my wife take pictures for me...If you can tell me where it may be, I will see if I can persuade her again. On the back side though, it appears to be those numbers in the top left of the first picture.

If there another tag anywhere...I have heard maybe on the axle sleeve?

[contagious102]

Dana 60,wish I had one.!! Could be the 44 both have same 10 bolt covers.

[GMC66]

Looks like the bottom left bolt may have the tag attached.
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[markreed]

Great call, GMC66...Got a picture of the tag...

3.54 gears...other numbers? 46 ring...13 pinion teeth?

[GMC66]

Thats right, 46 ring gear teeth and 13 pinion gear teeth.
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[markreed]

Awesome, you guys never disappoint!