I just have the pcv system to finish to complete my ls swap. After an hour searching online for correct routing etc all I can find is Efi set ups. Is anything different for a carb? Do I get a vented catch can? I have both valve covers that have vent ports as well as a port coming out the front of valley cover? Anyone have a diagram of what each port should do would help great! Thanks

They did go to the intake in the EFI ...I went with a catch can / air-oil separator.

Do you have a picture Doug? Also did all lines go to the catch can? Thanks

Sounds like you have the same as me . I put a fitting in the intake behind and just under carb and run it to the valley cover . The valve covers I added a small filter to pass side and drivers side . I felt this would give me the best flow from the head to the crank case to the valley cover from both sides . Air in and air out . I did not want to pull vacuum from the heads where the oil is slung around and suspended in the air . This could be pulled into the hose easily . So far this has worked good . I have no oil loss or very little that I can detect . You could put a non vented catch can between the valley cover and the fitting in the intake behind the carb if you feel the need to .

Here's a picture showing the filter that I mounted in the extra head bolt hole on the pass side , and the valley cover . I have a filter on the drivers side also .These 2 filters are for air intake to the valley fitting . This worked great for me with no problems .

I don't have a vent on the valley cover, just the valve covers....

I just bought a VMS catch can from ebay. Come with a breather but can be installed with or without it. If you gonna connect a vacuum line to it then no breather. It seems like pretty nice piece for how cheap it was.

Do you have any funky smells from the engine compartment venting this way?

You must not understand how this set up works . There is air intake from the 2 valve covers and drawn thru the engine and pulled into the intake from the valley cover . There is nothing expelled in the open air from the engine . It all runs thru the engine to be burned if anything . There would not be anything to have an odor . The 2 filters are intakes not exhaust out of the filters . Think about the flow and you will understand .

Ok so a filter on each valve cover, then run a line from valley cover w pcv valve to back of intake manifold?

This is correct , but you don't have to add a pcv valve . The valley cover has one built in in . Just add the hose to the intake vacuum . You could add a pcv in line if you would like but not necessary .

I run a ls6 valley cover to a vacuum line on the intake with a filter on each valve cover.

Are you sure about the valley cover already having a PCV valve? Not changing, it is just that I have the same thing and I ran a PCV valve with it.

Pop , I did not add one to mine . It only draws enough volume to vent the crank case . If it was an open vent it would be a major intake leak . I am pretty sure it has one built in .

Tx, Sounds like you did the same as me . Mine works great with no issues .

it's all built into the valley cover. I'm sure a PCV valve inline is fine, but not necessary.

Well shoot, that is easy then.

Thanks