We got this in from Donnybrook Australia a few weeks ago. This guy races in the desert and was complaining about no top end power. I had him send me a squish test and found the factory engine was running at .090". Simple solution, raise the exhaust port and correct the factory squish. This this thing should roost the North Koreans. We did a bunch more to get him where he needs to be. The castings were VERY porous. When I get into situations like this, I don't really worry about how it looks. I maintain the lines that make the power.
