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Discussion Starter · #1 ·
I have 440 the bore taper is just within spec, I want to save myself another teardown in 40-50K, So I am going to overbore the cylinders. I read somewhere that the later 440s had thin casting walls and the .020 was the recomended maximum. Any truth to this, anyone gone .030 over with a 76-78 440? It seems like .030 pistons are a dime a dozen but I don't see many .020???

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