I once bought a pristine 4400 gas combine for cheap as the owner couldn't get the engine to run at full throttle. He had a 8820 and was getting a another new combine so he just wanted to get rid of it. I drove it 20 miles to my farm with it having trouble getting up hills and no brakes. Had to go through town with 5 traffic lights. Had to drop header to stop but got it home. Did all the things you have done and no help. Happened to crawl into the grain bin and noticed the air filter in the bin had broken bands holding it in the cradle and the air hose to the carb was crimped. That was all was wrong with the engine. Replaced the bands and she ran great for 15 years until I sold it for 3 times what I paid for it. Recommend you take the air cleaner hose off the carb and see if it helps. If not, suspect carb needs rebuilt, retime or rebuild the distributor, replace the plugs and wires, not necessarily in that order. How old is the gas???? Might throw some Sea Foam into the tank and check the fuel pressure at the carb. Chevy 292's do not run very smooth, run hot, and suck the gas but they are very dependable in the long run. Good luck and let us know what the fix is when you get it running good.
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Today's Featured Article - Madison's County - by Anthony West. Philip Madison has been a good friend of mine for quite some time. He has patiently suffered my incessant chit chat on the subject of tractors for longer than I care to remember, and on many occasions he has put himself out, dropped what ever it was he was doing, to come and lend a hand cranking handles, or loading a find onto a trailer. Although he himself has never actually owned or restored a tractor, he was always enthusiastic and always around helping with other peoples projects.
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