Head Pressure building up

[jeffro788]

Hey guys, we just put a serpentine set up on the truck, therefore we had to put the pancake style compressor on, I think it is what would go on an early 90's truck. I have dual electric fans (pullers) on the back of the radiator that are temperature controlled to kick on 190, and it still builds up head pressure. We tried to seal off the open area of the core support that is above the condenser (about a 4" gap), so the air would be pulled through the condensor. That didn't work...... Next we added a pusher fan on the front of the condenser that kicks on with the compressor only, along with with the dual pullers that kick on with the engine temperature. Still not working.... Not sure where to go from here, that 3" gap between the condensor and radiator is killing me..