The mounting for the mower rear lift is totally different & is slightly wider apart on the 23bx mower deck & the two are not interchangeable. There have been some posts in the past where someone cut & welded 23BX lift mounts to a 22BX mower deck to retrofit a tractor designed for 23BX mount. Claimed the 22BX mower was cheaper, but IMO it is not worth doing. Depends on how well equipped your shop is & how much time on your hands.