I looked at a 1957 640 yesterday. It wasn't as the owner described, but I'll tell you what I saw and maybe you can tell me what to do.The tractor didn't run, but I did a compression test cold and dry and got between 100 and 85 PSI depending on which cylinder. The tractor had no air cleaner assembly and had been operated that way for a while. The sheet metal was worthless...yea it was there, but bent and rusted through. Same with the fenders. It had gauges but no proofmeter. Tires had good tread 90%+ and were not weather cracked. Overall, I think it was salvagable. While not great, I think the engine was probably OK for light duty, but would need a re-build if it were asked to do any serious work. I would have to find an air cleaner assembly and ALL the sheetmetal...no easy task. Question: Would the metal from a NAA, 601, 800, 801 or any others fit? What other models could I get the air cleaner off of? Based on other work I have done on tractors, my instinct tells me to stay away from this one. The price...$1000. Any opinions are welcomed...thanks...BB
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