There was a short tube in the block when I bought the engine and I bought a GM tube and fit it into it. I'll take a look to see if it is leaking. That was a good suggestion. Is the best way to fix that, with some high temp silicone?

I don't know the exact length of the second tube. I could measure it when I take it out, but it sticks out just past the manifold. I am pretty sure I have the same problem as Brett.