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Original Message
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| RE: How fast is this car?... |
| By Rory McNeil - 03/23/2002 12:49:08 PM; IP 24.69.255.205 |
On NHRA.com, the only head listed for a 67 Shelby 428 is the C7AE head, same head as a 390 GT, with the small (2.03, 1.56) valves. Considering that even the early 68 GT 500`s used the small valve heads, & that the 428CJ did not debut until WELL into the 68 calender year, I see no way that the "N" head was used in a 67. In fact, when the 428CJ first became available in a Shelby Mustang, the model was upgraded from GT500, to GT500KR. By the way, Travis, I have owned a pair of "early' CJ heads, they were casting # C8OE-J, same basic head as a "N", but they used the 14 bolt "390 GT" style exhaust bolt pattern, rather than the 16 bolt CJ setup. Considering that the Shelby 428 non CJ is allowed to run much more compression,& an aluminum intake, at a LOWER HP factor, I think someones getting a bit greedy.
Its well known that some questionable pieces have been allowed by NHRA over the years in Stock eliminator,ie: alum. PI intakes & 735 Holleys on 66-67 390 GT`s, alum. intake & Holley 780 on 71-73 351C`s,alum. SixPack Edelbrock intakes on 70-71 440 MoPars (only 69`s had the Edelbrock intake from the factory), 283 Chevs with larger 327 intakes etc.... However, these "superseded" parts ARE allowed in the NHRA blueprint guide, the CJ head on the 67 Shelby are not! |
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