[1930artdeco]

OK, I am not a machinist by any stretch of the imagination. But, even to me when dad said the Model A could be bored to .125 that was way to big for me. I 'think'-and this is my opinion-if you stick with the .060 that would keep the walls thick enough to not risk any cracks, hot spots etc.

Again just my opinion-I know you were looking for actual numbers.

Mike