your super dexta woud be spot on , the old machines are far more reliable, cheaper on parts if you need them , simple technology you see. You don't need 70/100 hp to spread fert, chain harrow and mow grass. A mule will cost a fortune and you wont be able to get parts next month,... I have a 1956 ferguson 35, almost every single part can be bought for it , dirt cheap next day delivery. Not that I can remember the last time I had to buy anything for it other than diesel.