7 1/4 Rear End in 69 Barracuda

Hey guys, just got word from the shop that my ring and pinion gears are shot in the stock 7 1/4 rear in my 69 Barracuda. They said they can rebuild the rear and to expect around $1500-$2000. This seemed pretty steep to me, and led me to a few questions:

Would it be smarter to look for a 8 3/4 to swap?
If so, what's needed for the swap? Does the 8 3/4 bolt right in?

This isn't a drag car, it's a daily driver, so I'm no opposed to just replacing the gears in the current rear, as money is a factor here.

The only gears I have found for the 7 1/4 are around $190.
Does that sound about right? Can't find much info on the 7 1/4.
I'm pretty familiar with the ring and pinion swap process, but if there's something tricky about the 7 1/4 I'd appreciate any input!

Thanks guys!