Let me get the register measured today, been at work. When we say register we are referring to the diameter of the crank that mates with the flywheel correct?
This motor was also pulled from a yard, and had been decked before. I was unable to see the id code stamped on it. From what I gather it is a 225 early somewhere around 65' to 67' based on the color/freeze plugs/ribbing on the block.