Oil Analysis Helped!
OK, Great advice from all... I went with an analysis of my oil and tranny fluid from Darrin of Insight services. Great service and info!! Via spectroscopic analysis there is not evidence of coolant contamination in either oil or tranny fluid. A background check with the previous owner's mechanic showed a head gasket change in Sept. '99. So...seems the gunk on the coolant reservoir was residual (I hope) from the old break in the gasket.
Question: should I still do a flush of the radiator and oil system if the analysis showed no evidence of coolant in the oil. Remember, I didn't test the amount of oil in the coolant, just coolant in the oil. I hear that oil in the water can be hard on hoses etc. Is there a good way to test for oil in the coolant system?