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Re: Hemi Exhaust Manifolds Date Code "12JB"... ???
[Re: xs29j8]
#1544240
12/05/13 08:46 PM
12/05/13 08:46 PM
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Joined: Aug 2003
Posts: 8,828
Houston, Tx
hemi68charger
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Joined: Aug 2003
Posts: 8,828
Houston, Tx
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Quote:
....
Wow Allen, those are some cream puffs........ 
TroyHouston Mopar Connection Club'69 Charger Daytona 440 - auto - 4.10 Dana (now with 426 hemi) '69 Charger 500 440 - 4speed - 3.54 Dana '70 Road Runner 383 - 4speed - a/c (now with 440)
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Re: Hemi Exhaust Manifolds Date Code "12JB"... ???
[Re: ScottSmith_Harms]
#1544242
12/05/13 09:29 PM
12/05/13 09:29 PM
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Joined: Jan 2003
Posts: 3,624
Fort Worth, Texas
xs29j8
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Fort Worth, Texas
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Quote:
What are the manifold casting numbers?
2780508 RH Side
3418453 LH Side
See pictures in 4-View picture in original post
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Re: Hemi Exhaust Manifolds Date Code "12JB"... ???
[Re: xs29j8]
#1544243
12/05/13 09:34 PM
12/05/13 09:34 PM
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Joined: Jan 2003
Posts: 42,714
Spokane Washington
ScottSmith_Harms
Mr Wizzard
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Mr Wizzard
Joined: Jan 2003
Posts: 42,714
Spokane Washington
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Quote:
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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Re: Hemi Exhaust Manifolds Date Code "12JB"... ???
[Re: ScottSmith_Harms]
#1544244
12/05/13 09:49 PM
12/05/13 09:49 PM
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Joined: Jan 2003
Posts: 3,624
Fort Worth, Texas
xs29j8
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Quote:
Quote:
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?
Month - 1 = January
Day - 2J = ????, wouldn't January 2nd be "02" ???
Year - B = ????, expecting "9" or "0"
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Re: Hemi Exhaust Manifolds Date Code "12JB"... ???
[Re: srt]
#1544246
12/06/13 09:44 AM
12/06/13 09:44 AM
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Joined: Jan 2003
Posts: 3,624
Fort Worth, Texas
xs29j8
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Quote:
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:
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Re: Hemi Exhaust Manifolds Date Code "12JB"... ???
[Re: xs29j8]
#1544247
12/06/13 10:06 AM
12/06/13 10:06 AM
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Joined: Jan 2003
Posts: 3,119
Sacramento,California
JRepucci
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Posts: 3,119
Sacramento,California
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Quote:
Quote:
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:
The top right manifold looks like it is 11 17 5; wow, that is early.
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Re: Hemi Exhaust Manifolds Date Code "12JB"... ???
[Re: xs29j8]
#1544249
12/06/13 10:42 AM
12/06/13 10:42 AM
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Joined: Jan 2003
Posts: 3,624
Fort Worth, Texas
xs29j8
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Quote:
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!  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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Re: Hemi Exhaust Manifolds Date Code "12JB"... ???
[Re: hemi70se]
#1544252
12/10/13 07:34 PM
12/10/13 07:34 PM
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Joined: Jan 2003
Posts: 3,119
Sacramento,California
JRepucci
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Sacramento,California
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Quote:
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.
That's another detail that I have noticed as well but I don't think you can see that from the top looking down into the engine compartment... There are a couple of "restored" 70-1 hemi cars that don't have the correct manifolds.
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Re: Hemi Exhaust Manifolds Date Code "12JB"... ???
[Re: hemi70se]
#1544253
12/10/13 10:06 PM
12/10/13 10:06 PM
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Joined: Jan 2003
Posts: 3,624
Fort Worth, Texas
xs29j8
OP
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Quote:
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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Re: Hemi Exhaust Manifolds Date Code "12JB"... ???
[Re: xs29j8]
#1544254
12/10/13 10:08 PM
12/10/13 10:08 PM
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Joined: Jan 2003
Posts: 3,624
Fort Worth, Texas
xs29j8
OP
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OP
master
Joined: Jan 2003
Posts: 3,624
Fort Worth, Texas
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Quote:
Quote:
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?
Another RH side view...
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