DO Pork Roast help please.

Here it is, 5.5# of good pork in a 12" DO.
This weekend after browning the roast, I will saute some garlic and then add some milk. Sound interesting?
I have found my chart that suggests to use 16 briquets on top and 9 on the bottom for 350 deg.
How long do I cook my 5.5 roast?
The recipe I have cooked a 3# roast for 1.5 hours.
Looks like it will happen Saturday so it does not interfer with the finale of the Sopranos on Sunday night.
Will Tony get whacked or does he do in Bad Phil?
This weekend after browning the roast, I will saute some garlic and then add some milk. Sound interesting?
I have found my chart that suggests to use 16 briquets on top and 9 on the bottom for 350 deg.
How long do I cook my 5.5 roast?
The recipe I have cooked a 3# roast for 1.5 hours.
Looks like it will happen Saturday so it does not interfer with the finale of the Sopranos on Sunday night.
Will Tony get whacked or does he do in Bad Phil?