JD B Piston Swap November 05, 2013 02:13PM
Does anyone know if a piston out of a 48 john deere B will fit in a 40 B? I know that the bore is larger in a 48 but other than that is there any difference? If it does fit will a 40 block take a .1875 overbore and still have enough wall strength?

Re: JD B Piston Swap November 09, 2013 03:02PM
Measure top dead center. Should be enough room between piston and head. Piston should be same length in both engines. The bore will fit. lots of room to go bigger.

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