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C6AE-R cylinder heads

January 20 2008 at 6:59 AM
alvin  (Login ASTIKHOSSW)

Does anyone know if in fact the C6AE-J or R heads were installed on the 1967 shelby non (cobra jet 428)using the gt 390 exhaust manifold,i was looking on the shelby websight that shows this head as a 428 PI.Also the NHRA blueprint spec shows this head as a shelby 428 shelby head.THANKS

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(Login RoyceP)

Typical low performance 352 / 390 / 390GT / 428 heads

January 20 2008, 7:09 AM 

The C6AE-R heads certainly could have been used on a '67 Shelby GT500. Like any other 428 in 1967 the heads are nothing special. The same heads were used on 352 pickup trucks for example.

If these heads were used in a unit body car (Mustang / Cougar, Fairlane Comet Shelby etc) then they were drilled for 14 bolt pattern to be able to use the unit body exhaust manifolds. They are common and cheap to buy. Core sets with 8 bolt holes typically sell for $100 - $200 a pair. You can drill the 8 bolt heads to fit the 14 bolt pattern if desired.

1915 Model T Ford touring Black of course!
1967 Cougar GT 390 Cardinal Red / Black
1968 Cougar GTE 427 Augusta Green / Saddle

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(Login machoneman)

So, what is the best "cheap" FE head: C1AE?

January 20 2008, 7:55 AM 

Perhaps the cheapest head out there without getting into pricey TP, HR, MR heads? Any thoughts on a range of iron OEM heads, low to high $?

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Kerry Johnson
(Login N69MF)

C4AE 6090 G

January 20 2008, 8:10 AM 

has big / MR type ports and was used on a bunch of different applications, should be easy to find. Add CJ size valves, clean up the bowls and massage the exhaust and they can flow some pretty impressive numbers. Here's a post on them and a few others: http://www.network54.com/Forum/74182/message/986317828/


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(Login inthegarge)

I prefer the C3ae-C or D's. But I run a lot higher compression.

January 20 2008, 9:01 AM 

It would really take more information to make specific recommendations. RW

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Kerry Johnson
(Login N69MF)

I agree, more info needed...

January 20 2008, 9:33 AM 

Like you said, the C3 and C2 heads would be better if you're looking for higher compression. But I think the flow numbers would be pretty much the same. Also, I think the C4AE-G heads are going to be cheaper and easier to find.


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Rory McNeil
(Login RM428)

Exh. ports

January 20 2008, 10:00 AM 

Don`t forget that all the pre 66 heads are lacking the material to drill and tap for the diagonal exhaust manifold bolt pattern, which you will need if the heads are to be used with exhaust manifolds in a shock tower equipped vehicle.

428 powered Fairmont drag car, Best ET:10.06@131.59MPH, best 60 ft: 1.32
59 Meteor 2 dr. sedan 332, Ford O Matic
74 F350 ramp truck 390 4speed

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(Login hawkrod)

I have heard it is possible but every original GT500 I have ever seen...

January 20 2008, 10:06 AM 

Every original GT500 I have ever seen had C7AE-A heads and I know the first 67's all had these so I can't imagine Ford dragging out old tooling to make more of last years parts when the new parts were readily available. I have heard a lot of people say that various 67's did have teh C6AE-R heads but I have yet to find an original verifiable car that did and I have been looking for more than a couple of decades. Hawkrod


39 Ford Deluxe Coupe
59 Tbird 430
60 Lincoln Premier
(2)62 Tbirds
(3)68 Cougar XR7-G's
69 Cougar 428CJ 4 speed
77 1/2 Ford F250 4X4 w/460 swap
86 SVO mustang
76 F250 Crew Cab
1969 Mach I
look at my cars past and present at superford!

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john vermeersch
(Select Login johnvermeersch501)


January 20 2008, 12:07 PM 

FE head is the one you have available when you need it !!!! It is pretty well evidenced here that all will flow the air you need at SOME time during youre rpm range.. In reality, due to their large casted size, what they do BEST is...keep the piston IN the hole when the rod breaks !!!

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January 20 2008, 12:35 PM 

There is a NHRA stocker racer here that runs a gt 390 fe with c6ae-r heads and a S intake that runs in the high 10 second range,that should say a lot for those heads if they were not ported.

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(Login CaptCobrajet)

Stocker heads.........

January 20 2008, 2:10 PM 

It only takes about 250 cfm at .500 to run 10's with a 3400 pound Stocker, Edelbrocks for Stock flow a little more, but they are also 170cc. The 140cc head that is a little bit down on flow to the Ed head will run faster because of volume........cipher on that a little. "R" heads are good. So are C4-G's. I suspect the short port truck heads might be better than both on the street. If it was legal, the first thing I'd do to the 390 Stockers is raise the floor, which is done already on the later truck heads. Street engines need velocity. If you are not 450+ cubes and 6500+ rpm, use a small port with some tweaking. It is the same reason the Streetmaster manifold works so well in streetable applications.

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