Another question, I have a 4" 318/390 crank, I want use it to check measurements useing my stock pistons in my 360 block. Would sticks of chewing gum (with the wrapper still on of course) work for bearing spacers if layered in the correct thickness or would cardboard off the bback of a legal pad, cut in strips , layered to thickness be better? Keep in mind this is Only a mockup. Unless there is a carpenter out there who can make me some bearing spacers out of hardwood.