swap HiPo manifolds for correct 68 GT350 manifolds

[Corey Bowcutt]

The exhaust manifolds that came in a box (came with SST headers on the car) with my car are C7ZE-9430 A and 9431 A which I thought were for my car.  Come to find out these appear to be HiPo exhaust manifolds so clearly not for my 1968 GT350.  So I would like to trade these for correct manifolds for my February 68, 4 speed GT350.  They look to me to be in very good condition but I am by no means an expert in fact very much a novice.  Let me know if there is any interest.  In reality I will probably never swap out the headers because the car runs so well but I like to know I have the correct manifolds should I ever want to.

[KR500]

Cory
Beware that although all 1968 GT 350's and for that matter all 302 J code engines exhaust manifolds have the same casting numbers 4 speed cars have an additional machining so the air tube fittings have more clearance to the manifold. As A/T cars use the IMCO emission system and therefore no smog pump/air tubes they do not have this additional machining in the flange area.
Rodney

[Corey Bowcutt]

Thank you Rodney.  I learn new stuff literally every day.

[Royce Peterson]

Also they have date codes so it will not cost anything extra to find the right ones the first time. Lots of them on eBay usually. I would buy the Lo - po 302 manifolds and then list yours for sale. Yours are worth a lot more than the correct ones.

Thank you Rodney.  I learn new stuff literally every day.

[Corey Bowcutt]

Royce,

Thank you for that.  I actually suspected that was the case.  I guess I should do some homework.

Corey

[JD]

IIRC the exhaust manifolds you have may also be correct for later '67 GT350's (wider user range than just '68's), the earlier cars used C3 and a C4 identified parts but later cars used the C7 parts, not sure when the change occurred (time) and others will know better.

[Corey Bowcutt]

The history of the motor in my car is a bit of a mystery.  The block has a date code of August 67.  I have no idea if these exhaust manifolds came on that engine originally or not?  When I bought the car it had headers and the PO provided a box of parts including these manifolds.

[Royce Peterson]

An August '67 casting would be likely for a '68 model year car. What's the assembly date stamp on the block and what is the build date of the car?

The history of the motor in my car is a bit of a mystery.  The block has a date code of August 67.  I have no idea if these exhaust manifolds came on that engine originally or not?  When I bought the car it had headers and the PO provided a box of parts including these manifolds.

[KR500]

An August '67 casting would be likely for a '68 model year car. What's the assembly date stamp on the block and what is the build date of the car?

The history of the motor in my car is a bit of a mystery.  The block has a date code of August 67.  I have no idea if these exhaust manifolds came on that engine originally or not?  When I bought the car it had headers and the PO provided a box of parts including these manifolds.

Regardless of the date codes of exhaust manifolds in Cory's photos they are not a factory application for a 68 302 J code Mustang/Shelby