That COE surely has a 235 ci Hitork. My hitork has the numbers '235' embossed on the side of the pan about mid way along the side near the bolting flange. Also have installed a later 235 crank for pressure oiling, done by an expert motor builder buddy. There was an article on this pressure crank conversion in an early Inliner's 12 Port News. I'd think more cubes would be in order for a COE, like a 261.
Best of luck
