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FWIW, I had terrible problems with a Blue Thunder FE intake manifold. The distributor hole was bored 1/4" off center. I bought it from "River Racer", a well known Blue Thunder dealer. I called Blue Thunder and talked to the owner, George, I believe. He hatefully accused me of lying and said it couldn't possibly be a Blue Thunder intake. I ended up getting my machine shop to have it welded up and re-bored it to the correct location. That ended any future chance of me buying a Blue Blunder product.