help with 64 dart rearend

Well, I found one on ebay with a inflated price, but I found the part number there, it is P/n 2404134. So, I bought it on rockauto.com. i am wondering if I should attempt this myself or have the local vintage car guy do it for me. I do not have a gear puller, and I do not know which type I need to do the job right. I think it is about 1 hour of labor tops?