67 GT500 drivers side exhaust manifold

[GT500-0314]

     I need a drivers side exhaust manifold for my 67 GT500 (12/21/66 San Jose-1/6/67 SA)
I bought one a few years ago but don't like the look of the studs (rusty-look weak)
This manifold is on EPay right now. Seller claims Mustangs used C70E-9431A. I've seen most
posts here mention C6OE? Anywho, need some guidance :-)

auction

https://www.ebay.com/itm/C70E-9431A-LEFT-EXHAUST-MANIFOLD-For-67-68-MUST-GT390-500-SHELBY-GT500-428-/163977604282?_trksid=p2385738.m4383.l4275.c10

I know the date code is later than I need. Most of my date codes are 10/66 or so if someone has a manifold

[Royce Peterson]

Sent you a PM.

[shelbydoug]

The engineering number and date code would mean it's a '68 model year. They are physically the same.

If not I don't know what the difference is. Generally a change in engineering number for what seemingly is the same part indicates a change in design of some sort.

[GT500-0314]

The engineering number and date code would mean it's a '68 model year. They are physically the same.

If not I don't know what the difference is. Generally a change in engineering number for what seemingly is the same part indicates a change in design of some sort.

Hi,
    The seller claims that the C7 has a slightly different angle for the H-pipe for the Mustangs. I've never heard
that before? I thought the C6 and C7 would be physically the same as you say.

[roddster]

  Studs can be replaced by a competant muffler place.  If that is all you need, you might want to ask around your neighborhood.

[Greg]

The studs are realtively easy to replace.  As said, a competent muffler shop can do this for you.  If you want to do so yourself it is pretty easy if you have the tools.  I did a quick search of youtube and this is a good one.  https://www.youtube.com/watch?v=9PKNCVXvZ6w&t=320s

You would need acetylene heat for yours. 

[shelbydoug]

The engineering number and date code would mean it's a '68 model year. They are physically the same.

If not I don't know what the difference is. Generally a change in engineering number for what seemingly is the same part indicates a change in design of some sort.

Hi,
    The seller claims that the C7 has a slightly different angle for the H-pipe for the Mustangs. I've never heard
that before? I thought the C6 and C7 would be physically the same as you say.

If they were exactly the same then there would be not change in engineering number from C6 to C7.

If the exit angle is different then there will be a different part number for the head pipes also.

You ill need to put the two side by side to see the difference.

All that you need to change the studs is a "stud puller" tool. If the studs can be cleaned up enough with a thread cleaner or tap, to lock a nut tightly, then I would leave them alone.

It's possible you could snap them off with the broken part of the stud embedded in the casting OR split the casting itself.

[Royce Peterson]

The C6 LH manifold won't fit Mustangs or Shelbys. It hits the steering box. Only fits Comet / Fairlane.

The C7 version was reworked so it fits Mustang / Cougar / Fairlane / Comet.

The engineering number and date code would mean it's a '68 model year. They are physically the same.

If not I don't know what the difference is. Generally a change in engineering number for what seemingly is the same part indicates a change in design of some sort.

Hi,
    The seller claims that the C7 has a slightly different angle for the H-pipe for the Mustangs. I've never heard
that before? I thought the C6 and C7 would be physically the same as you say.

[shelbydoug]

Mine is a C7.