This chopper is basically an early 80's superbike. The 120 cu/inch (with an optional 163 cu/inch big bore for the really brave of heart) motor was built with Chevy big block components by Larry Sexton (of dragrace fame). He considered low piston weight important to reduce vibration, and used flat big chevy pistons (on the photo right) way before the Evo (flat piston) was introduced. Casted his own carters, cilinders, heads and used Chevy valvetrains. He positioned two male HD connecting rods next to each other, instead of the HD forked set up. The plan was to start a line of engines, but only several (all slightly different) were built. Would love to build a bike around one..