The Dana 70 Detroit is a nice fit but requires the use of 1.5" 35 spline axles. Cheap Locker but the rest of the mod can get a bit pricey. But hey the last one just ran the KOH and didn't break, didn't finish either but towed a racer out and wheeled the next day on Sledgehammer.
$390 is a good price, better than I can get. Make sure they can get them at that price before you chunk down your change. I'm seeing this a lot lately. Some of the clear out close ou Diff sellers are coming up with great prices but in the end they can't get the product to you.
On the other hand if the can get you this price let me know and I will beat up on my guys.
I get along well with the DL I've got them in two of my trucks, I may however put an ARB in my 110 (30 spline) just because of how I use it.