I reached behind the motor on the drivers side and nearly got my arm stuck. Anyways when I pulled it out there was a small amount of oil on my hand from the intake manifold. Does this mean I've got the infamous LT-1 vacuum leak? The last time the car was at the track it was disappointing to say the least. And the car seems a little flat under WOT. Other then that it seems to run ok under normal driving. Is this possible? Could a leak like this cause the car to run at least a half second slower than what it should?
Thanks for any help!

 

When I had that infamous Intake leak the car ran great, Just had Oil all over the freaking place. Unless you can do a Vacuum check you won't know, But a Vacuum leak will make the car run poorly