Important if you run D-H/S or SA

[Michael Beard]

in checking the validity of this aforementioned manifold NHRA asked Mopar about a Technical Service Bulletin issued in 73 or 74.

If the manifold had a legitmate right to be in the Guide based on a TSB, it should've been put in the Guide when the TSB was issued. This sounds like a case of, "Well, it's been so long now that nobody will really know, and besides, parts are just so hard to find, so they'll accept anything."

obviously folks have a dislike for the 340 as racers have gotten the thing to run really fast

"Obviously"? That assertion is unfounded. People are discussing rules. It doesn't matter who runs what combo, how fast anyone's gone, or what manufacturer's part is trying to be shoehorned into the Guide. Again, either the part is legitimate or its not. Everything else is moot.

We have an LD340 manifold in the attic. That doesn't make it legal for Stock.