Hi doctors, how long does plaque in the arteries take to progress into a complete blockage, when minimal now. 60 y/o male?

Many factors affect. This is highly variable. The natural course is for it to slowly progress but the odds are it will never progress to complete blockage and it could stay stable or even regress and disappear. Many factors determine how quickly it progresses or regresses: your blood pressure, diet, activity level, stress, exposure to toxins, genetics etc. See http://tinyurl.com/axtab4d and http://tinyurl.com/9x3n594.