Of couse you can put it on there, just like you can put a 48" deck on a 70. But If you put those decks on those tractors, you will be lugging the motor in tall grass, overheat the motor and prolly blow it. The reason the 317 48" 324 54" decks will not fit on a 1340, 1541, or the 1860 is that the front axle is not swept forward like the later models Cyclops and the deck will end up hitting the front wheels