If it had a simple hole then you should be ok. Go ahead and install the compressor but dont install the drier until you are at the shop that will be charging the a/c since you dont want the drier to be open for very long or else it will absorb water from the air. They will have to pull the system under vacuum for about 15-20 mins, make sure it doesnt have any leaks and then recharge it with r134a for you. they will also inject oil into the system at the time of recharging it.