Posted for "Dr. Resonance" <resonance@jvlnet.com>:

 A few months back some flyer told me of a company that was rebuilding one
time run twin-turbo Continental engines.  They were flowing the heads and
other tricks to deal with the overheating/valve problems that sometimes
occur
in the stock twin-turbo BIB-550 Continental engines...

Dr Cox:
Performance Engines in La Verne, CA is one such shop. They build racing
engines for a lot of the California crowd and have an excellent reputation.
Stuart Featherstone is one of their principals, and a Legacy builder.
Contact them at sales@PerformanceEngines.com, or 909-763-5228.

I haven't flown behind their engines, but plan to have them build one for my
IV-P

Bob Pastusek