Replaced my MC Specialty Green Antifreeze this weekend. Did the thermostat at the same time.
Thought I'd share this little trick: It seemed like I only got about 1.5 gallons out from the petcock with the front wheels on 10" raceramps. So, Once I had the thermostat removed from the housing I put the cap back on the de-gassing bottle and a rag into the themostat housing (hose side). Then using another rag as a gasket I used my 18v leaf blower to force air into the thermostat opening to the engine. After about 2 minutes, I forced out another 1/2 gallon. I thought others might find that a useful "hack".
Including the degassing bottle, I was able to add back 2 gallons. It seemed no burping/air purging was necessary. I thought I would need more than 1 gallon diluted with distilled water, but ended up with an extra unopened gallon.