What do I need to know about this?

I'd be suspicious. There's not a Dana that I know of with a 9.250 ring gear. The Dana 60 has a 9.750 diameter ring gear, the Dana 44 has a 8.5 diameter ring gear the Dana 70 has a 10.54 diameter ring gear so I don't know what the hell they're talking about. Even if it's a Dana 60, you'll have the expense of cutting the housing to fit, cutting and resplining the axles.....IF they can be resplined and then getting the bracketry right on it.