I have a 429 Cadillac engine block. This is standard bore. Cylinders have .007"-.012" of taper. It would likely clean up with a .020" overbore. It has been thermally cleaned and shot blasted. It has been cracked checked with a magnetic particle inspection system and there are no cracks. There are no spun bearings. FIRST $500 cash. No need to offer less. Sicks won too ate tree for for sero won five.