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Old October 4th, 2015, 04:28 PM
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Join Date: Mar 2015
Location: Cave Junction, Oregon
Truck: 1964 GMC 1500 LWB Wideside 305E V6.
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Default Re: Original 1964 305E V6 Piston Size

Those pistons look to be .125 over....unless I'm forgetting the stock bore size. I think those would be a little much for an overbore. Heck...those .040 over pistons you Have are rare!
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1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust.
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