I picked up the 3.54 rear end yesterday. All looks good, especially after cleaning it up good in the parts cleaner. It has 4 spider gears like the truck 4.11, same axle spline count, and same mounting bolt pattern. The bearings look and feel good. It took me a while to get it cleaned up last night, and some friends came over putting a damper on things in the garage. Last night I was only able to clean it and make a new gasket. I woke up today and went out in the garage. I swapped over the pinion seal from the old one to the new one because it was brand new seal. I did have to swap my drive shaft yolk to the new pinion which was just a matter of pulling the old one off and pushing mine on. I put the pumpkin in, and all went smooth until it was time to put the axles in. I got the axles and bolted the backing plates in and I had too much end play. I spent most of the day fooling with shims getting that right. It's still not perfect, they are a little on the loose side but I'd rather that than too tight. While messing with all that I managed to rip one of the new outer axle seals I just put in a few months ago so I'll have to wait to finish it once I get the new seals. I filled it up with oil and greased the outer bearings. It rolls over nice and smooth. Looks like I'm in business!