273 4bbl dyno results

Cometic will make head gaskets in the bore dia you request. The fire/seal ring will be at the normal 4.1somthing dia but added material to fit our little bores. Thats what I did they were a little pricey but nothen custom is cheap & there MLS gaskets. Make sure surfaces are really smooth & let er rip! Thanks again for posting! Sweet little motors indeed!