To me stock is whatever was available on that model tractor when it was new, or was made available from the OEM as an upgrade.
For instance, I would consider a Farmall M with oversized, firecrater pistons as stock. A Farmall M with the sleeves removed to run a greatly oversized piston and the crank worked to gain stroke is not stock. A Farmall M with a 450LP head on it running on racing gas is also not stock in my book.
One way to keep them somewhat honest is to have them hook to an appropriate plow or heavy disk and pull it through a field for a couple hours. The heavily modified engines generally can't survive that, they are made to run for 300 feet only.
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Today's Featured Article - My Ford Golden Jubilee - by Troy Estes. This article is about my '53 Ford Jubilee and a story that starts with taking the tractor to my brother's Starter/Alternator Rebuilding shop for a wiring fix. The generator was shot as well as all the wiring. I dropped off the tractor expecting a transformation from a 6 volt to a 12 volt system utilizing the original generator housing, and a total rewiring of the whole tractor. The front end center pin bushing was worn also so I ask that they replace it if they had time. Well, that’s wha
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