I am seriously thinking of repowering my WD allis the allis engine runs but is using oil and when figuring a total rebuild sleeves and all it would be pushing $2000. Even with the hp upgrade it would still be under what Im after. What Im looking to do is make a adpter plate to match both the motor and tractor trans out of 1/2" plate and have the tractor flywheel redrilled and balanced to the engine . The engine Im planning to use is a straight line 6 ford 300cid . a belt driven governor off a combine will be used as well . I plan to set the max rpm at around 2400 which is comparable to the 4cylinder currently in the tractor. I figure this should give me roughly 75 to 80 hp . I would rather find a diesel engine to replace it with but funds are short and I have the ford handy. This wont be a tractor pull project but a working machine . Do any of you have any expearience in repowering old iron ?