blown head gasket

ProCharge94

20+ Year Stangneter :roc</strong><span class=
Aug 31, 2004
71
0
7
Jax, FL
How much excessive oil pressure and for how long before damage is done to the head gaskets? The head gaskets are only two weeks old, but the excessive oil pressure has been present since the install of the new gaskets.
 
If its a stock guage get a real one....and how oil press. blew HG's is new to me.
Mine is about 60psi on start-up...thats aFMS high volume pump also.