Take both the radiator cap and the thermostat cap off.
Remove the thermostat.
Lift the back of the car as high as you can up to about 12-18" and be comfortable that it's stable and safe.
Pour coolant into the thermostat opening on the engine until it comes out the radiator, then put the radiator cap on.
Fill the recovery tank to the cold full line.
Continue to add coolant until it appears to be full at the thermostat cap.
When it appears to be full, put the thermostat cap on loosely and start the engine for 30 seconds or so.
Check coolant level. If needed, add more coolant and run the engine again.
Keep doing this until you can add no more coolant.
Lower the car. Add more coolant if you can.
Put the cap on and start the car letting it warm up. The thermostat is still out at this point so you have full circulation.
Let the car cool off so you can safely remove the thermostat cap. Add more coolant if required.
If you can add a lot, then go back to the starting for 30 seconds until you can't add anymore procedure and then warm it up again.
Eventually you will get to the point that you can add no more coolant.
At that point, replace the thermostat and put the cap back on being certain that you have it on tightly.
Watch your temps for the first few trips. A rapidly fluctuating temperature needle (shaking) is an indication of air in the system.
John Stricker