help with 64 dart rearend

It's easier with shop air and the factory manual tends to be over dramatic...lol. IMO, pay the shop. Prob will cost an hour's labor and shop supplies. Also, after shopping over the last 3 weeks for 7.25 parts... Your parts guy HAS to be very good. The computer cataloging will not come up with the right numbers 90% of the time, and a mediocre parts guy with a good set of books will screw it up 30% of the time...