Originally Posted by Sh0velMan

Covered this in a different thread, but the fat connection (rear most) on the valve (cam) cover that connects to the intake pipes is an inlet, the skinny (forward) is the outlet, the system depends on manifold vacuum to evacuate the crankcase and heads.

Confirmed this via vacuum testing the engine while running and monitoring the MAF voltages... The manifold vacuum draws air from the intake pipes, through the heads and crankcase and out the forward nipples.

Cans are only needed after the air exits the forward nipples.