With the engine assy I was also supplied with a Holley front drive assy....Now.... with the LT engine family there are a few changes that need to be accommodated.....Since these engines are direct injected the PCV system becomes very important.....In a normal engine assy if oil vapors get into the intake and get on the intake valves the incoming gas will wash it off keeping the valve clean...... In the LT since it is direct injected this is not an option.....Holley copied the GM system and they have a vapor collection reservoir (like a catch can) that drains the oil back into the oil pan..... I'm sure there's more to it but this is my understanding of what's going on...Holley doesn't include this drain back feature in their kit......I was going to use AN fittings and rubber hose.... But they cautioned that keeping the drain feature away from the exhaust system and also maintaining a downward pitch to the drain.....I could see that my original idea wasn't going to work....the motor mount adaptor plate and motor mount wasn't going to allow this.......So, after going in the house and thinking about this.... I went back out and took the original draintube that was on the drivers side and cut it up and welded it back together and (with a little bit of grinding on the ribs between the motor mount bolts) the tube now fit under the adaptor plates and were hidden from the exhaust manifolds
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