Hi I have kind of hit a dead end with this 510b. I bought it for dirt cheep knowing it had a bad knock and started tearing it a part the other day. Today I found out the no 1 jornal is 50 thou out. So im wondering what are my options? Are there new cranks around, or what other engines would fit? 510b's seem to be very rear around here, "Alberta canada". I thought they were dry sleaves but this is a wet sleave. would a 188cu or 159 case engines fit without much changes. This is a great little tactor and I would like to see it runnig again and can really use it around here. A tractor like that with a loader and running good can go for $4000 or more around here so I don't mind throwing some money into it. Thanks for any help you can give me