i know this has been beat to death, but i have a clarification question. I am wrapping up an LS3 swap into a porsche cayman. to do this i have to reverse the intake, and reverse the valve cover (oil fill is on the rear drivers side now). i am running a valley plate without any pcv port.
since i had to reverse the valve covers i assume is does not change which side the pcv lines go to. the side with the longer arm that comes out of the side of the valve cover still goes to pre throttle plate. and the side with the fitting straight up off the back goes to the nipple on the intake.

my next question is that i will have a difficult time routing the other side pre throttle valve. do i have any other options?

 

On your valve covers you need to see what you are doing for a PCV port. Normally for a valley plate system the valley plate has a little restrictor in it about .100 of an inch. If you are not running one (valley system) then your valve covers one of them must have a restrictor in it. Running a straight 3/8 line with no restrictor will create too much oil consumption. So you need to make sure the valve cover to the front air bridge does not have the restrictor. The restrictor must go from the vacuum port of the intake to the valve cover with the restrictor. The reason for no restrictor to the air bridge is under WOT the engine needs to vent (via valve cover) and that how it vents and you do not want a restrictor there. To test it you just blow into tube and you can tell which one has the restrictor. Here is a photo of the valley pan restrictor.

 

i definitely do not have a valley plate connection.