Dana 60

One: make sure it’s a Dana 60.
Two: I’d buy both of them if they are cheap enough.
Three: the big tubes I’ve measured are never over 3.125 and I know @lead69 did some research on this so maybe he will see this and chime in.
Four: cut the ends off and have someone local doing the job. I know guys are in love with the side adjusters but to me it’s a bunch of smoke and mirrors. It isn’t any stronger and it’s not that hard setting up the gear set.
Five: the thick tubes make it all the more rigid.

@lead69 and I both have our D60’s in for narrowing and set up. I’ll be the one running 4.88’s and spool on the street.

The more I think about this 9" I have narrowed to go under Vixen, the more I think about a mini spool. I may just stick one in it. ......that didn't sound right.