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What are the manifold casting numbers?
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I thought the format was month, day, year "mddy", like B159 would be November 15, 1969... but that doesn't work in this case.
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I thought the format was month, day, year "mddy", like B159 would be November 15, 1969... but that doesn't work in this case.
Why doesn't this work in this case?
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Scott, similar to the format I sent you pics of in the past
3DB and 6JB
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Scott, similar to the format I sent you pics of in the past
3DB and 6JB
Hemi exhaust manifold date coding varied over the years... a few examples from my assortment:
I believe that one of the sets that I bought from the Cline family in the mid 1980s was the original set from the red 4 Dr Hemi Coronet.
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The manifold is part of two sets of Hemi exhaust manifolds that I bought from the family of Floyd "Pappy" Cline who owned the red 4 door Hemi Coronet in Wichita, Kansas. The Coronet was parked in the driveway without the engine or transmission, and I made several attempts to buy it... but we couldn't agree on a price. The two pair of Hemi exhaust manifolds were priced to sell though... $150 bought both pair!
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Jason,
There is a better easier way to tell early vintage from later vintage. If you look at the pic you posted of your later manifold you will see it has the revised casting where the manifold ports meet the head (they are more smoothed) This was started in 1969. Allen's pic of his RH manifold has the "step" at the ports where the manifold meets the head.
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Jason,
There is a better easier way to tell early vintage from later vintage. If you look at the pic you posted of your later manifold you will see it has the revised casting where the manifold ports meet the head (they are more smoothed) This was started in 1969. Allen's pic of his RH manifold has the "step" at the ports where the manifold meets the head. (pic right above yours)
As a side note: all the repro manifolds have the stepped ports since they were modeled after early manifolds. Which is really funny when they cast the 34xxxxx Ebody style part # into it
Allen, Can you post close up pics of the ports?
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Jason,
There is a better easier way to tell early vintage from later vintage. If you look at the pic you posted of your later manifold you will see it has the revised casting where the manifold ports meet the head (they are more smoothed) This was started in 1969. Allen's pic of his RH manifold has the "step" at the ports where the manifold meets the head. (pic right above yours)
As a side note: all the repro manifolds have the stepped ports since they were modeled after early manifolds. Which is really funny when they cast the 34xxxxx Ebody style part # into it
Allen, Can you post close up pics of the ports?
Which RH manifold do you want close-up pics of? Here are a few of the "12JB" manifolds... anyone willing to help on the date code?
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LH side...
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Jason,
There is a better easier way to tell early vintage from later vintage. If you look at the pic you posted of your later manifold you will see it has the revised casting where the manifold ports meet the head (they are more smoothed) This was started in 1969. Allen's pic of his RH manifold has the "step" at the ports where the manifold meets the head. (pic right above yours)
As a side note: all the repro manifolds have the stepped ports since they were modeled after early manifolds. Which is really funny when they cast the 34xxxxx Ebody style part # into it
Allen, Can you post close up pics of the ports?
Which RH manifold do you want close-up pics of? Here are a few of the "12JB" manifolds... anyone willing to help on the date code?
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Jason,
There is a better easier way to tell early vintage from later vintage. If you look at the pic you posted of your later manifold you will see it has the revised casting where the manifold ports meet the head (they are more smoothed) This was started in 1969. Allen's pic of his RH manifold has the "step" at the ports where the manifold meets the head. (pic right above yours)
As a side note: all the repro manifolds have the stepped ports since they were modeled after early manifolds. Which is really funny when they cast the 34xxxxx Ebody style part # into it
Allen, Can you post close up pics of the ports?
Which RH manifold do you want close-up pics of? Here are a few of the "12JB" manifolds... anyone willing to help on the date code?
I don't know what to tell you about those dates. But here is a 10-69 manifold with the more usual dating style.
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Allen,
Unfortunately that one close up pic you showed of the flange is so surface rusty I can't say which style it is. Need some better pics
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... Any help would very much be appreciated... If you don't want to post the info, please PM me or email xs29j8@charter.net ... Thanks, Allen
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I have a set that came off an early production 1970 Hemi Roadrunner (delivered about December 20, 1969). Here are the casting numbers from those.
