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Terry Burtz, Calif · 07-25-2018, 08:56 PM

The left hand rear main bolt hole that Herm mentioned was reamed to .505 inch diameter to a depth of 1/2 inch.
From the center of the above hole to the surface of the rear main thrust bearing is specified to be 1.4335/1.4345 inches.
These dimensions are from the Ford drawing of the cylinder block.

07-25-2018, 08:56 PM	#3
Terry Burtz, Calif Senior Member Join Date: May 2010 Location: Campbell,CA, USA Posts: 320	Re: Centering a Model A Crank, in a Block ! The left hand rear main bolt hole that Herm mentioned was reamed to .505 inch diameter to a depth of 1/2 inch. From the center of the above hole to the surface of the rear main thrust bearing is specified to be 1.4335/1.4345 inches. These dimensions are from the Ford drawing of the cylinder block.