67 K20 Final Drive Ratio...

[lukefalls]

Keep the HO52. They're actually very good. Check out the link:
http://www.pirate4x4.com/forum/showt...highlight=ho52

I can't remember the exact year that the Dana 44 was changed to the GM 10 Bolt. Maybe 76ish?

They definitely look different.
http://coloradok5.com/axleguide.shtml

Strength between the two is similar. Some say the 44 is better. If I recall correctly, later dana 44s have larger wheel bearings and larger axle shafts. Oh, Dana 44 housing are said to be thicker. Its been so long since I cared about Dana 44 stuff that I forgot.

For whats its worth, I never subscribed to the strength issues. There is much more aftermarket support for the Dana 44 and for that it gets my vote. A well built 44, with conservative driving can handle lower gears and big tires. I ran 4.10s and 37 for years on the rocks of the Rubicon (yes, a full size). That being said, you can blow up a Dana 44 with 33" tires if you drive it like you stole it.

A decent set of shafts and good Spicer u-joints will go a very long way. So will routine service.