It looks like the engine in my 300D is starting to get pretty tired. A few months ago I pulled the cyl head and had new guides and seals installed. Now it looks like doing that work has brought out the fact that the lower end is starting to get tired. It runs real rough when cold and shakes pretty bad at idle. If you do not give it fuel when cold it shuts off. It does run out good on the highway and you can't tell anything is wrong with it except the heavy smoke on full throttle acceleration. I tested compression on all five cyl this evening and found #5 only got up to around 160 psi. 1-4 were over 200. Also, I put #5 at TDC and put compressed air to it and it pressurizes the crankcase. I am trying to decide whether to do a rebuild as a winter project or just part it out. I figure new sleeves, pistons, and crank bearings would get it back to where it needs to be. I kinda hate the thought of parting it out because it rides/drives pretty doggone good. What do ya'll think?

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Jim