Quick glance..........Looks it might have been bored .080" in its prior life. Top of the piston maybe marked with an over size.
Or it was bored or "fixed" on line .005" bored at the factory which mean nothing now and prior it was .080" bore with .010" of wear. to get you close to where you are now ?
Stock 248 is 3.718" 270 would be 3.781"
Last edited by showkey; 12/15/2016 6:05 PM.
