74 400/440 HP exhaust manifold

[jhoop]

Does anyone know if the passenger side exhaust manifold on a 74 400 HP has the heat riser valve in it. The casting # is 3751071 and that casting was used from 72-74 but I am led to believe the 74 did not have the heat riser.

The manifold on my 74 Rallye is off a C body and is cracked. Trying to make sure I find the correct manifold.

[Nacho-RT74]

nop... AS FAR I KNOW, the heat valve system was gone by 72 or 73 I think

can be wrong though

[odzking]

Here is a pic of my 73 400HP passenger manifold.
I am not sure about 74 but mine is an April build and has the heat riser. 3751071 is correct.

[jhoop]

Anyone with a 74 400 HP or 440 know? Trying to get verification so I don't look for the wrong one.

[odzking]

Upon further checking in the parts books, right side 73 is a different number from 74.
Keep in mine part # is not a casting #.
73 - 400/440 is 3751069
74 - 400/440 is 3769308
They're different.

[jhoop]

Well if anyone knows where I can find one please let me know.

Thanks, Jason

[jhoop]

Feb 9, 2013 18:48:36 GMT -5 odzking said:

Upon further checking in the parts books, right side 73 is a different number from 74.
Keep in mine part # is not a casting #.
73 - 400/440 is 3751089
74 - 400/440 is 3769308
They're different.

Well now I'm unsure of the correct casting number for a 74 400 HP. The one I have is casting # 3751294. Date code D273 and that may be correct but I haven't been able to verify that.

[odzking]

TTI even lists them as being the same but (again) according to my book, they are not.
Maybe someone with a 74 Chrysler parts book can verify.
BTW, that is a typo on my part ... should be 3751069 for 73 part number.
73 Chrysler parts book agrees with that.

[jhoop]

Feb 10, 2013 12:22:11 GMT -5 odzking said:

TTI even lists them as being the same but (again) according to my book, they are not.
Maybe someone with a 74 Chrysler parts book can verify.
BTW, that is a typo on my part ... should be 3751069 for 73 part number.
73 Chrysler parts book agrees with that.

Well I have a 74 parts book and the part number for the RH HP manifold for the 400/440 is 3751795. Still don't know the casting number though.

[odzking]

According to my parts search, www.bradsnosparts.com/ has one with your part number.
Give him a call, maybe he'll be nice enough to give you the casting # off it.
Also found this:
bluesmobiles.proboards.com/index.cgi?board=details&action=display&thread=1012

And according to this site the casting # for what you are looking for is 3769207
www.mopar1.us/exhaustmanifolds.html

Here too (looks like same list):
randymacsmopar.zzl.org/PDF/exh...pdf

Hope that helps