Wowwww, super nice modding job!!!!!
I did the same thing with my old JD 54in blade for my BX23s. But i used an old donor JD420 frame that i got from a JD junkyard place locally. I cut off the front part of the JD frame, and fitted/bolted it to the front of my BX. I even bought the 4-valve kubota manifold and installed it on the JD blade. I did have to build some spacers for the frame to fit on the front of my BX because the JD420 tractor frame is wider. The spacer blocks i welded in were .875 thick, and very wide for each side to keep it very rigid and tight to the BX frame. Grade 8 bolts keeps the frame secured to the front of the BX frame. None of the bolts have ever come loose while using it. It has all worked 100% perfect for me thru the last 2 winters of plowing snow, but it does have its limitations. This year, i decided to go back to using the FEL. The front blade is nice to keep things cleaned up between snowfalls, but not such a good thing for super deep snows and large drifts. Its only going to handle just so much. But nonetheless, having the blade is really nice for pushing some stone and gravel around in the summer. Especially when i can switch from my JD420 over to my Kubota, then back to the JD when i want it on the JD for certain things. Options are nice, so you don`t have to tie up one tractor.