Started the investigation this evening. No
oil in the coolant, and no coolant in the
oil. Coolant in several cylinders, not limited to one side. The #1 cylinder pumped the more coolant out than any of the others. I pulled all the plugs, squirted all the cylinders with Marvel Mystery
Oil, and turned the engine several times by hand, pumping the MMO out through the plug holes. I repeated this process three times. That is as far as I made it tonight. Tomorrow, my goal is to get the intake removed and see if I can locate the actual failure.
I have drained the oil (no water!). I am planning a flush by running the oil pump with a drill and draining it again. I am hopeful that I didn't hurt the bottom end. FWIW, the gasket failed between shifts, so I wasn't full throttle. That may have made the difference. Or just caused enough damage that it will run fine for awhile and really make a mess when it goes.....
Racer X: Don't know what brand gaskets. Shelby block, e'bock heads, Blue Thunder hi-rise dual-plane intake. It's a KC crate engine, built in the summer of '07, although I didn't get it running until June of last year (properly stored, turned occassionally by hand & primed before the initial start-up). I have 1500 miles on it with no more than 100 heat cycles. Three oil changes. The hottest it has ever been was 95C. During the track day, it was holding a steady 80C and 60-80 psi oil pressure all day Saturday.
More to follow.