Is the 383 a better engine, or does the 440 just have more displacement?

Does someone make a Dana that is designed to bolt right into an A body? That would certainly make that part easier. Plus, you could recover a good chunk of your Dana investment by having an A Body 8.75 to sell. And if it was in good shape with Posi-traction (just kidding, I meant Sure Grip), it would be worth even more.

Talk to cass a doctordiff.com.
I have a nice new one from him I put in back in 2018 with 4.10 gears. I did not have the spring perches moved in.