Not a dumb question at all!
On the 24XX, they had 5 sets of tabs welded (top outside for BH or lift arm cylinders, middle for toplink, bottom used for BH or lift arms. So if you have enough material to weld to back there it should work fine.
Also, the 3 cylinder system incorporated this way is easy to remove, but would be a bit strange for lifting. Another 24XX owner [answering a similar question of mine], noted that where it does work great is blade work (since you have TnT and vertical angle by default). Oh, this also requires a 3spool valve; two if you don't desire TnT.
The only problem I'd see is the (1)4XX would have really limited visiabilty. PT's version had the QA plate, mine came with standard arms, but the original owner [nor me yet] never got around to getting cylinders for it. I'd say, 24XX has better visabiltiy than a CUT on the rear even if you're facing forward [facing backward would be like riding the attachment itself! /forums/images/graemlins/cool.gif], but [unless they were loosing attachment sales] PT discountined it for "lack of interest."
Soooooo..... Go for it! We want pictures! /forums/images/graemlins/grin.gif