Handy Little Axle Shaft Chart...

[loafer]

http://www.kabele.com/axleshaftsgm.htm

 

[2Dogs]

That is cool.

Reminded me of this. Your chart complements this well:
http://coloradok5.com/axleguide.shtml

 

[pauly383]

The chart shows 2wd and 4wd 12 bolt shafts as different lengths , but if you use your bacxking plates off a 6 lugger its a perfect fit lrngthwise

 

[divorced]

It's only 1/32" difference. I've swapped them before without swapping backing plates.

 

[pauly383]

Mine had to be swapped for sure , my 12 bolt came from a 73 pickup , backing plates were shallower as the brakes were skinnier back then .

I never even opened a brake line , just left the brakes intact and dropped the axle housing down with the backing plates and brakes staying on the truck