The H3 4:1 is a no go... it is a slip-yoke style case with no means to remove the slip-yoke section from the back half of the case. I was hopeful it would work for my Blazer too...
I have some advice for you... don't put your hands on the bottom side of the axle when you are trying to position it. It really hurts & can deform your hand if it falls. And don't weld while shirtless... And don't lie down after heavy grinding until you have cleaned out your eyebrows... sharp shards of tiny metal can fall into your eyeball... that also hurts really bad.
I am excited to see YOUR variation of an SAS! Lots of updated, please!!!
Sent from my "two hands on a keyboard"