Canner78, keep in mind, if you are doing up a street car and are building 400hp or less, an 8 1/4 rear will meet your needs just fine, and save you plenty of money.
I went with one instead of an 8 3/4 for that reason when I had my 73 with the 360. I got it for 40 bucks at the local yard. The 8 1/4 is a great rearend it's just a pain to try and find one with sure grip or anything better than 2.76.