I was able to measure the top of the BBC 366 ci. pistons that I had the tops cut down to work wih the stock rods today. The thinnest spot I could find on the top of one of the spare pistons was .2418. I then measured from the top of the piston to the bottom of the valve relief and that confirmed the .080 the shop told me that they had taken off. So if my math is correct and there is not to much deviation in the piston casting. The pistons should be about .1618 thick at the thinnest point. Anyone with ideas how weak that might be.
Larry
