Hi GFUJI,
watch out for leaks on your intake manifold. I had to throw my Blue Thunder away, because it was so porous that I once found water seeping into the engine from the intake manifold, which welding did no cure.
I also had abnormal
oil consumption (1liter per 100km) which I could not pinpoint where it came from. After replacing the manifold with a Performer , the
oil consumption went back to normal.
I do not know if casting has improved at Blue Thunder, but 10 years ago that is what they were delivering.