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Farmall & IHC Tractors Discussion Forum
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Building H pulling tractor

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Howard N

09-19-2004 18:58:39




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I want to begin building up a '39 Farmall H for stock pulling 3500# to 4000# class. Want info on boring block (how much oversize can you go?) , and what are alternatives for carburetion? Let me know what works!




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ChadS

09-20-2004 07:02:43




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 Re: Building H pulling tractor in reply to Howard N, 09-19-2004 18:58:39  
Howard, here is some info you might look into for engine options. maybe go with a 350 sleeve and piston kit. If done right, you can get a solid 50 hp out of it. Manifold and carb, a Super H-350 manifold, and a M carb. If you can find a 350 engine sitting somewhere, (c-175) grab it! The cam, and cyl head in the later versions of this engine are much better than the old H, everything interchanges. Biggest bore in a H block is 3-13/16 and still run on the block, you could go up to 4 inch bore, but that is alot of machine work, but, you can use Massey 44 pistons in it, with a stock H stroke with a 4 inch bore. Hope this helps, ChadS

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JRB IN MAINE

09-20-2004 17:50:05




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 Re: Building H pulling tractor in reply to ChadS, 09-20-2004 07:02:43  
BORE max on a H motor for sleve is a 3 7/16 4" brings you to an M sleeve that probly over bore the block check with your local machine shop that specializes in blocks to see if you can go that big on an H motor.



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