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scooder · 06-23-2014, 04:40 PM

You can use the measurement I gave you. You have the 3 3/8 pistons Sat there, measure them from the top of the wrist pin bore to the edge of the crown. If it's the same, they're 3 3/4 stroke, if they measure close to 0.125" less, they are 4" stroke.
Get it?
Martin.

06-23-2014, 04:40 PM	#184
scooder Senior Member Join Date: Jul 2010 Posts: 2,593	Re: Boring a flathead You can use the measurement I gave you. You have the 3 3/8 pistons Sat there, measure them from the top of the wrist pin bore to the edge of the crown. If it's the same, they're 3 3/4 stroke, if they measure close to 0.125" less, they are 4" stroke. Get it? Martin.