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Original Message
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| It depends. |
| By Dave Shoe - 07/08/2001 9:02:23 PM; IP 216.243.158.36 |
The 352/390/410/410/428 got two types of heads in 1966-67. The type you have on your car will determine which header you want.
First off, I recommend FPA (www.fordpowertrain.com) because they have the best fitting, highest quality header for ya. They're not cheap, but they're still a value. The Tri-Y design seems to work as well today as it did for Shelby 35 years ago.
I run Hookers, but they crowd the engine bay a bit more, and they only fit some of the 390GT heads from 1966-67 and no 390GT heads from 1968.
Basically, if the head casting is the emissions-era C6AE-J, C6AE-U, C7AE-A, C8AE-H, or D2TE-AA, then you wanna run FPA's GT-type header. If it's the C6AE-R head, you'll wanna run the CJ-type of header.
It may sound confusing to hear that the C6AE-R head can deal with either the GT or the CJ type of Mustang header, but it works best with the CJ type.
I've gotta get a NICE digital camera so I can take some comparative photos of the exhaust ports on the head, but for now I'll just say that Ford repositioned the exhaust runner on "emissions era" FE heads so they mismatch pre-emissions heads (and also C6AE-R and CJ heads) by about 5/16". The mismatch causes more than porr flow, it also causes gasket leaks due to the poor gasket crush by the header's weld bead.
I don't presently have time to find a link to an old post which bertter describes this issue, but you might try searching this forum for the keyword "C6AE-R" or "reversion" to find some more info.
Shoe. |
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