273 Cylinder Bore .004 over spec

The cylinder needs to be measured with a dial bore gauge using some type of setup fixture (anvil mic). Otherwise take it to a shop and have them measure it.

Shars makes an affordable (< $200) 19" dial bore gauge in .0005 resolution if a guy was interested in expandin his tool collection.

That said, if the holes are too big it will have to go to a machine shop anyway.