There's a couple ways to do it...

1. Put cans in the existing PCV and fresh air feed lines (what I did)

2. Cap off the OEM stuff and run lines from the valve covers to a catch can.

The LS6 setup only has 2 lines:
1. PCV line from valley cover to manifold
2. Fresh air feed line from TB to passengerside valve cover

The LS1 setup has 3 lines since the PCV system draws from the valve covers:
1. Drivers side valve cover line coming around the back of the manifold
2. Passenger side PCV valve cover line which liks with the driver's side line and runs to the manifold
3. Fresh air feed line from TB to passenger side valve cover

However, all of this is moot unless you ran your lines to a vented breather can and the breather can is shitting oil everywhere. The motor in my father's Panoz was doing this. It'd get the can 1/2 full and oil wold mist out the breather filter and make a huge mess.

FWIW here's my dual can setup put inline with the OEM existing lines: