First, thanks for the reply fortech.
I primed the Master Cyl (per service manual procedure) before beginning.
1st method (Pedal w/Helper) was way to tedious & slow to be effective.
2nd method (Gravity) was even slower than 1st & ran the risk of letting reservoir get too low unless closely supervised.
3rd method (Power Bleeder) worked great - it's just that I continue to see bubbles after putting 2.5 gallons of fluid through the lines.
3rd method is: simply fill the Power Bleeder canister with fluid, connect to top of reservoir and pressurize (with hand pump) to 12psi. Then open one bleeder at a time (starting with longest line) until no more bubbles are seen. Then move to next wheel.
Thing is, as mentioned previously, the bubbles never cease. Considering a 32oz. bottle of Prestone Synthetic DOT 3 goes for $5 at WallyWorld, and that I've run 10 bottles (i.e.-2.5 gal) through the lines so far means I've spent $50 so far with no hint of improvement.
When I say the lines hold steady while pressurized, I mean when I pump the Power Bleeder to 12psi that pressure holds steady until I open a bleeder valve. Also, when I press the pedal, it goes down quite a ways, but holds short of touching the 1"x4" board I have behind the pedal to prevent excessive travel.
After doing this, I checked all couplings for signs of fresh brake fluid - none found leaking.
Leaving me wondering WHAT GIVES?