Yea, I sure do have the origional GT-40 paired with the X heads. It is proven to be a great combo as far as being matched, however I still beleive that there might be power to be made with switching the intake. There have been tests to prove both ways... better and worse, so it's really hard to tell unless it's tested on your car. I think I am going to eventualy switch to a Holley before too long, but that still won't be for a while. The car fund has gotten quite small.
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