The more I look at that, the less I believe it's from an 80 series. The area with the bolts threaded halfway in and what looks like a bleeder valve isn't familiar at all, and the frame bolt pattern doesn't look right either. Nor does the input section- never seen an adjuster nut like that on an 80 box. No idea what it could be. Some non-U.S.A. 80's came with a variable-assist steering box, but I don't think they looked like that.