I didn't read all of the posts-the early rearend has the keyed axles with the nut on the end. Also it has no parking brake features. The parking brake is on the end of the transmission.. A few years back, I helped a friend install a 68-70 B body rear in his 58. He had to move the perches in a little bit-I think then on top of it we swapped in his dual quad 392 Hemi. He passed away before he finished it, his wife sold it to a friend of mine in Kansas, and he passed away. His brother then sold it on his estate sale-it was covered on one of You Tubes "Scotts Speed Shop". Check it out.