I just finished measuring the heads. Needless to say, I'm a little disappointed. Here's the actual CC's:

80.6 79.2
81.9 79.6
82.3 79.6
82.2 80

A far cry from the advertised 84cc. There is also a small hole in one of the chambers size of the point of a small pic. Will this cause a big problem for me? It's circled in Red.