Won't be easy, but you can add one to the 582, as long as it is not a 582 Special (Peerless transaxle), but not to the 149 because it is a hydro (hydrostatic drive). A PTO from a Farmall Cub or another Cub Cadet, will fit the 582, but the top shaft in the transmission will have to be changed (pricey if you can find one) and you will have to find the PTO shift linkage from a 582 with a PTO or try to adapt one from some other gear drive wide frame Cub Cadet such as a 108, 128, 800, 1000, 1200, or build your own linkage. Shift linkage wise, it would be easier to put one in an Original, a model 70, 71, 72, 73, or 100 because they used the same shift linkage as the Farmall Cub.