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Tractor Pulling Discussion Forum

H bore

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redhpuller

01-21-2005 16:07:11




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How big can, or should i bore out an H block and use sleeves.Would a set of pistons and sleeves out of an M w/ an overbore kit work?What about wrist pin size and compression height on H vs. M? any info is appreciated. DAVE




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ChadS

01-21-2005 16:27:30




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 Re: H bore in reply to redhpuller, 01-21-2005 16:07:11  
H blocks can handle 3-13/16 with no hard block if its a good block, Not big enough for an M sleeve, unless you move the cyls around. But on 3-13/16 and smaller, on H blocks, 350 sleeves are kinda thick, 3-3/4 barrel diameter, but a large flange diameter, and would have to be cut to the H flange so it does not overbore the H block to accept a stock 350 flange in stock form. 350 blocks are more forgiving. Massey 44 pistons are very close to the same compression height as the H, and is 4 inch bore, no stroker is needed. 4 inch bore 350 blocks can be done if you choose to go that big. ChadS

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