I don't know the answer you're looking for, but your question reminds me. Back in about 1977 I saw a farm house with a 3pt blade in the yard for sale. Looked nice, not used much. I stopped and ended up buying it for $125. Only "tractor" I had was a B6100. That 7' blade fit on it nicely but was a bit too long so I had 12" cut off of each end by a neighbor. (As time went on the neighbor got a divorce, sold the place And moved on.) After about 10 years I had a B8200 and wish I had the 7'blade instead of the 5 footer. I went up to the neighboring property and the mans scrap iron pile was still there. I found the two end pieces that had been cut off and had them welded back on. Still have that blade!!