Actually the Con Rod in the Standard Blue Head 35 plus 21 (R7) will not fit the LC 35 plus 21 "Cordoba" engine, the crankshaft pin in both the LC and the "Cordoba" engine is smaller in diameter than the regular 35 plus 21 "BLUE" head engine, the "R7" replaces all the old "R" series rods, therefore only the "C" series rods will fit the LC engines.