3.07 gears for my Dana 44

[phelan]

Hey there guys! My name is Ross and I have a '66 GMC C1000 that I'm restoring. It is also my daily driver though, and a big part of my commute is I27 with a 75mph speed limit. I currently have a 305E with an SM420 and what I believe is 3.73 gears, but I'm on the lookout for a good deal on a 351E (Magnum). Anyway I know 3.07 sounds tall but I can work with it and need the mileage. I've found a few of these online but I need to verify that they will fit. Am I correct that my D44 is 26 spline standard rotation? What else will I need for this conversion? I do plan on keeping the Muncie for a while also.

[phelan]

I went to the local "you pull it" salvage and found a finned Dana 44 differential cover for my '66, off an Isuzu Rodeo. The '60-72 GM trucks were all pretty much gutted so I couldn't find any gearing :/

[BarryGMC]

Go back to the you pull it yard and look at early 70's to 77 chevy 1/2 ton 4x4 front ends lots of these have 3.07 dana 44 gears.

[phelan]

Thanks for the heads up- there wasn't but one or two of those either though :/. Do you know if the ring and pinion from an '80 Corvette Dana 44 is the same spline count as my truck?

[bigblockv6]

What spline count are you referring to? Axle or the pinion?

[phelan]

Pinion I believe. In other words can I bolt in the 3.07 ring and pinion from the Vette into my truck?

[bigblockv6]

As long as the 3.07 gears are from a Dana 44 and are standard rotation there should be no problem.