NEED 400ex HEAD Quick

[mxdad423]

I am in need of a good head for a 400ex, We blew our brand new engine apart on the Dyno Friday, not even an hour and a half on the engine, one of the new exhaust valves broke and took out the everything, unbelievable. Anyway, need a head, will be going with oversized valves to doesn't matter if valves are good or not, will be putting in new ones. Less then 2 weeks before 1st National and this happens, made me sick. Let me know what you have.

Thanks
Kevin Smitley