I am new to the forum and I am seeking some information/help on choosing what motor to power an experimental Cessna clone amphibian that I am looking at possibly purchasing. Are there any members on the forum running a modified Ly-Con motor or a Victor Aviation rebuild? Between the two, which rebuilder would you choose and why? Have there been any issues when running the higher 10:1 compression on either motor? Are the ported/polished heads offered by Ly-Con worth the expense? Which motor is lighter? Currently the aircraft has a Continental IO-520D that needs a rebuild but it has the "light" case and I do not know what crankshaft it has so it will potentially cost more to rebuild...Also I have never flew or owned a Continental only Lycomings O-320 "experimental Pacer"and O-540 "Cessna 182RG" and I have been let down by them. I have the potential of purchasing a O-540-J1A5D from a Maule that was overhauled and I have been thinking about possibly having that tweaked by Ly-Con or Victor. Ly-Con is claiming that they can get 330-340hp when its converted to FI with the port/polish heads and Sky-Dynamics non aerobatic intake. Now I would like to have a higher powered motor 300+hp but....I do not want to jeapordize the motors reliability especially when flying into and out of lakes in Canada if I go ahead and buy this aircraft. Any help/info will be greatly appreciated. Thanks!