I was given a crank/engine from a 73 460 car (2yABC) that the previous owners says was turned. I assumed .10 over but after installing new crank bearings there was at least another .10 gap in there between the crank and rod bearing. The pistons from the same engine are .30 over so my next assumption is that the crank is .30 over. To be safe I was going to use a micrometer and measure the diameter of the crank and subtract that number from what the crank was brand new. So, two questions: What was the size of the crank from the factory and am I on the right track?

Thanks