273 Build

toolmanmike said
Something happened to one of the heads on my 273 along the way. If I remember correctly, I had a 178 and a 920. The bank that had the 920 had one later model rod bearing in it. Anyway, Woody shaved both heads around .030 to get them to the 57cc minimum. Just a FYI.

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If you shape and unshroud the chamber around the valves...you can get them to carry higher in the lift and pick up around 6 cfm cfm or so.