Offshoreonly.com - oil cooler/procharger test?

Just a update with a couple quick questions on the 502 scarab w/procharger. As many of you know, I had a water issue...I pulled the intake and the gasket looked worn, but couldn't really tell if it was leaking. Intake was tight on one side, but could remove the other intake bolts with a socket easily. Pulled the head gaskets and heads. My back cylinder on left side looked as if water had been getting into it and the gasket looked extremely worn. Heads were pressure tested and tested fine. Head gaskets were felpro and intake was GM brand, don't know if that may have been a difference. Felpro gasket # for 502HO? I am gonna go ahead and pressure test my oil cooler in the meantime, what is the best way to do this? Also, anyway of pressure testing my procharger, or checking intercooler to see if its causing the problem?