843 with perkins 4-154 has cracked head, can get one but with frieght and gaskets and getting valves moved plus foreign exchange will be about $3500 canadian. rest of machine is pretty good, lots of new parts, tight axles, minimal chain stretch, good oil pressure and hydros work good. also looking at repowering but will be lots of work and expensive. I like doing stuff like this but it will take a lot of time and effort, I have other things on the go.LOL If any one needs lots of parts let me know it may help me make my decision.