I have the complete valvetrain from a 2001 454/502 MPI Mag engine that was removed for the Tyler Crockett upgrades. The parts are in perfect condition and have 200 hours on them. All are stock Mercruiser parts. I have the Cam, Timing gear & Chain, valves, springs, pushrods, roller lifters, rocker arms, flame arrestor & removed hardware. 250.00 and I will pay the shipping. [email protected]