Coolant leak - 318 w/ Ac

I recently had a local shop install an a/c in my Dart. Since then I've been dripping some coolant. Not sure where but I see it down on the K member and on the ground, only when I drive the car for a good distance. I don't have an overflow bottle hooked up but I don't see it coming from the hose area. Something tells me maybe its coming from one of the bolts that go into the block thru the water pump? Maybe the shop didn't reseal one of those bolts?

Does anyone know which bolts that go thru the a/c brackets thru the water pump into the block get sealant? Thanks in advance!