8A Backhoe Compatible With an 850 Tractor?

[hepheastus]

I'm new to the whole tractor owning thing coming from a postagestamp 1/4 acre to now 9.5 acres, but the first purchase was an 850 with PS and JD loader (don't have the loader number memorized yet). Now I'm looking to add a backhoe. I understand that a JD 8 backhoe will fit on the 850, but I've found a good deal on an JD 8A backhoe ($1300)in good condition. i;ve confirmed that I can still get the undertractor mounts for the BH. My question is will the 8A work with the 850?

Thanks in advance!