Been scounging some flathead parts and am wondering which oil pan is best for a 33 or 34. I am planning to build a 8BA series (hopefully with a Mercury crank) for a 34 Tudor project I started collecting for when I was a kid. I have the truck pan with the large clean-out on the bottom and just picked up a decent car pan. Are there any issues with the truck pan in a 34? Also may have scored a Mercury crank. I've read to identify that plugs are generally the 5/8 but this one is not - it has the small ones. It does measure over 6 inches perpendicular to the crank across the counter weight. I didn't see any casting like the 1CM or other identifying marks mentioned in the searches. Am I doing that correct? Does anyone have a picture showing that measurement being made?