3406E Reman Cyl. Head

Installed part# 10R5984 Reman Head on my "5EK" 3406E only to find out later CAT service letter says cyl. head gasket could be different due to "saw-cut" or "non saw-cut". How do you determine the difference?  My Mech. had never heard of this and I've had some problems ever since overhaul.

Any help would be greatly appreciated!