Moser Engineering Rear Ends?
You can have an 8 3/4 put together for $1000-1200 with stock type parts. If your car will just be a mild street car, that's all you'll need. A truck dana modified for a car will be a little more but also take more abuse. Or open your wallet and order a Strange 60.
If you plan to race the car and keep adding power, get a Dana. If it's always going to be a driver, just get an 8 3/4.