6066 (1960-1966) GMC Truck Club - 401M Crankshaft Bolt Circle diameter

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- - 401M Crankshaft Bolt Circle diameter (https://6066gmcclub.com/showthread.php?t=48285)

tommr

July 15th, 2014 04:10 AM

401M Crankshaft Bolt Circle diameter

Anybody know the flywheel bolt circle diameter on a 401 crank. thx

Funky61

July 15th, 2014 04:33 AM

Re: 401M Crankshaft Bolt Circle diameter

Hello Tommr;

I measured four inches (4") bolt center to center.

tommr

July 15th, 2014 10:46 PM

Re: 401M Crankshaft Bolt Circle diameter

thanks for checking that. its a big help.

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