I have a TO 30 30 HP tractor, that had a cracked block, which is a common problem with the Continental z-129 engine.. I put more into getting a block and having the engine completely rebuilt than the tractor was really worth, but i do not regret it , its a great tractor, and will out perform and out last them little yuppie 27hp diesels today ! Any questions feel free to ask I maybe able to point you in the right direction. Yesterdays tractors is where i got all the engine parts to rebuild it.. IF its a TE model instead of a TO beware its an English model and parts are harder to find on them models, since they are a little different ! The ID plate is right on the dash with the model..