Flush operations completed and here are the results. First time flushing for me so I got better on each flush. I completed three total flush cycles two of which using Blue Devil Coolant Flush with Degreaser. From Left to right bottles are numbered 0 - 3.
0 is my starting point prior to flushing
1 is the result of the first flush using the Blue Devil Flush with degreaser however I flushed with the thermostat in place and drained only using the pet cock on the bottom of the radiator. I estimate only about half of the 10.5 qt capacity was removed.
2 is the result of the second flush after removing the thermostat and disconnecting all of the hoses and running the garden hose both ways on every hose and radiator
3 is the result of third and final flush using the degreaser thermostat removed and all hoses flushed and back flushed with the hose.
As a precaution, in the event I have any oil contamination coming from the head gasket, I am currently running a final cycle using Blue Devil Gasket Sealer and distilled water ( I found no negative comments about the product on line and nothing but positive on line reviews ) It supposedly works by getting into the head gasket causing it to swell and seal any leaks.
No final flush is required according to the directions. Just reinstall the thermostat, drain some of the water and fill with coolant. Fingers crossed. I'll post another pic with a bottle of the coolant after finalizing the procedure.
Thanks to all for your comments and suggestions!