[Mike Voth]

Right. C-10 is unleaded, so unless you put hardened valve seats in the heads, you'd be asking for a lot of trouble! Like micro-welding the valves/seats. Also, replacing the seats to run unleaded fuels just makes for the possibility of the seats coming loose and causing another big headache. Leaded fuel is the way to go, and until the government says otherwise, we'll leave the unleaded fuels, like C-10, for someone that doesn't BEAT the valve seats nearly as hard as we do!!