Is it faster to get air bubbles out of cooling system by draining the system of all it's coolant, refilling it and then put front end up on ramp with air tight funnel to burp it or keep the coolant in the system and do the same procedure? I have been doing the latter for hours and my heater is still cold. Also should the bleeder valve be open during either procedure?

When you refill the coolant make sure the purge valves are open, then add coolant VERY VERY SLOWLY. If you pour it in quick you will definitely be trapping a big bubble, one coolant pours from the purge valves close them up and continue adding coolant very slowly (like literally it will take one minute to add one gallon of coolant.

Once the system is as full as you can get it start the engine, heater on max heat max fan speed, when it hits normal operating temperature go for a short drive down the road, from a dead stop floor it wide open throttle up to about 25-20 mph then slam on the brakes hard (almost triggering the ABS). This will toss the weight of the water backwards and forwards in the engine and displace the bubble. Once the hot coolant hits the back of the thermostat housing you'll hear it gurgle loudly and you will immediately have hot air blowing from the vents.

That's my trick, works nearly every time, sometimes you need to do the WOT/hard stop thing twice.