Important if you run D-H/S or SA

[Jeff Teuton]

OK, lets start over. That manifold is in the book from not too long ago. It was put in by NHRA, but in checking the validity of this aforementioned manifold NHRA asked Mopar about a Technical Service Bulletin issued in 73 or 74. That bulletin would explain why it was used. NHRA asked Mopar about the manifold. and Mopar asked me as they know I have the parts books back to l960. I looked up that number and it is not there. However casting numbers are in the NHRA book and not part numbers, but from every other manifold (and other parts) in that era, the part number was usually one off (the last digit) from each other. I do not have the old TCB's, but am looking for some people who are just as old as me (maybe not as fat and stupid) that might have a collection of these Bulletins. NHRA has the number of the Bulletin, but I can't find one. Since this started Billy cited Galan Govier, a reknown Chrylser authority on what got produced by Chrysler as they allowed him to look at the old records. According to Billy that number was around, but the part number was preceeded by a "P" which indicates a Chrysler Performance part which would indicate an aftermarket part with no warranty for one thing and usually sold thru dealers and sold by Mopar Performance. A company could be a Mopar Performance dealer or any franchised dealer (which I have been since 1968). If that is the case then it is aftermarket and I have sent this to NHRA in the form of an email. And they agreed to give me a few days to see if anyone has this Bulletin. Blocks, heads, manifolds from what I remember. Now most of the time a "P' number is embossed on the part, but not all the time. I think any race block I have had did have the "P' number embossed on the block. Now if this manifold was produced as a performance item, maybe the "P" was included on the number on the thing. Someone posted a picture of the supposed manifold, but I could not enlarge it enough to see if it, the "P' was there. Maybe someone could look that picture and can see better than me. That would solve the mystery. However from 1968 on emission regulations were an issue and many times a part change was done to correct something especially in the fuel system. We have seen this many times in the years since emission controls. Probably not in this case but it has happened. So obviously I don't get it, but an explanation might be here just as the explanation was offered for the 42 year old Camaro 350. We never raced a 340 except and T/A, and it is still here in Houma with an Edlebrock manifold with the original owner. If we had raced the 4 bbl version, I would probably know. One interesting thing in this whole discussion is obviously folks have a dislike for the 340 as racers have gotten the thing to run really fast. This manifold was never in-the-book legal until 2017. Now if it has been allowed by NHRA for some time and people have been running it then it got by, then maybe we start over. (old saying 'Its not what is legal, it is what passed') And if no one has been running it, then opponents will have no relief.