Hello any chance you would be able to tell us if a 54" sears mower deck would fit under our sears mower 917.250261 (it has a 50" now and the 20 HP kohler) I realise that the 54" is generally under the larger kohler (25 HP I think). there is this 54 " available and we would like to try it but don't know if it will hook up under our present unit or not.. any idea on this thanks