Originally Posted by Last930
That's a tough one - there are so many places it can leak. As it only leaks at higher rpm when oil pressure rises I'd be looking at fittings in the block such as oil pressure sending unit that are subject to the pressurized oil. Look for an oil system diagram.
Thanks for the input. We dropped the motor and resealed the oil pump. It's tricky to diagnose because the leak comes from the drivers front of the engine, opposite side of the oil cooler. Valve covers, push rod tubes, cam seal, oil cooler all look good, so the oil pump seemed like a possibility. I hate to put it back in car without being sure, but short of running the engine out of the car, I don't think we can duplicate it without installing it again.
I'll double check any fittings on the block and reinstall tomorrow. Hoping for the best!