I'm pretty sure they are interchangable up to something like 1980 when they switched to metric. I recently added power steering to my 70 and I was going to use a box from a '76. The 76 box bolted up fine with no modifications, but I couldn't use it because it was too worn out. I bought a reman. box at Hi-lo for a 70 and the only difference between the 70 and the 76 box I found was the input shaft (the splined thing that the rag joint connects to) was a different size. Turns out the input shafts changed size around 76. I had no trouble finding the right size rag joint at the junkyard.
[This message has been edited by j-dogg (edited May 07, 2002).]
|