Another Differential Question
 

I have little experience with solid rear ends. All the rear end experience I have is IRS. So nothing with axil hubs. My 72 as best I can figure is a peg leg 3.50. But I am not sure of that ratio. It does not have a round case so that tells me Dana. My searches come up with bits and pieces, but I am not finding a really good definative source for a 72 setup. A new Blue Print 400 is on its way. Tranny in for rebuild. I figure I may as well complete the Trio and swap the pegleg for a posi. With the horse power of the engine, that 3.08 gear set in the for sale section is tempting. Input and if you know of a good link for set of steps to disassemble it would be appreciated. Thanks all.

Re: Another Differential Question
 

It should have a Dana 60 with 3:54 or 4:10 gears.

https://www.scribd.com/document/3527...-X510-8DSD-pdf

Starting on Page 139 is the Dana 60 breakdown.

Re: Another Differential Question
 

Generic info packet from the GM Heritage Center:

https://www.gm.com/content/dam/compa...olet-Truck.pdf

This will give original axle info and ratio availability (assuming your gear has never been changed).

I like a 3.40 or 3.42 ratio as a nice compromise between off the line performance and highway use with a non overdrive transmission. 3.73 for use with an overdrive trans.

K

Re: Another Differential Question
 

Thank you both.
Looks like I have my reading assignment for the week.