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Original Message
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| Same as 390GT heads, except... |
| By Dave Shoe - 10/11/2003 8:55:06 PM; IP 216.243.176.34 |
...for the exhaust bolt pattern.
The raw castings are the same as any FE car or pickup truck that year, but the 390GT and 428PI head assemblies got different valvetrain goodies, such as stiffer springs, non-rotating valve retainers, and valves with grooves compatible with the non-rotating retainers.
Most heads (including 428PI) would be the new-for-1966 small "velocity" runner type, but some would retain the larger runners of 1958-65 but gaining extra emissions and exhaust manifold bolt bosses for drilling as needed.
Available casting numbers would be C6AE-J, C6AE-L, C6AE-R (the only large runner type), C6AE-U, and C6AE-Y. Again, the raw head castings for 428PI engine were the same as for any other FE that year.
Shoe. |
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