Newbie Dumb Diff question

To be perfectly honest; I know VERY little about differentials. My project is a 1965 Dodge Dart slant 6 car. My plan is to transplant a 360 small block with a 904 tranny. At first; I was just going to go with an 8 3/4 Chrysler rear end with Sure grip. Since the car is so small; I would relocate the leaf spring mounts inward 3 inches; and have the perches on the rear end moved to accomodate. So far; it makes sense to me. I also would have the rear end and axles shortened to accomodate the "tubbed" wheel wells; thus making plenty of room for larger tires.
Now to the point: OK; so i pick up a copy of the Nickle Ads for my locality and there sits an ad for a Dana 60 rear end with 410s for $100.
So my question is quite candidly; Can I use this? Is it a good price? Or were certain Dana's meant for certain car makes? I only recognize the name Dana 60 from being around hot rodders for much of my life; but I have never switched diffs before. So whats the deal? I haven't called the ad yet; mostly because I didn't want to sound stupid. I'm ignorant; but not stupid :book: