"I love it when a plan comes together". It looks like you're well on the way to getting the problem solved. If the oil hasn't turned milky-looking, you probably don't have enough contamination to worry about. I'd suggest doing an oil and filter change at around 1,000-mile intervals a couple of times to be sure as much of the coolant has been flushed out as possible. Good show!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!