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Original Message
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Edelbrock = CJ bolt pattern |
By Royce - 02/07/2004 8:39:25 AM; IP 171.75.108.100 |
There were two bolt patterns used in Mustang / Cougar / Fairlane / Comet unibody midsize Fomoco cars.
The 390GT engines used a 14 bolt pattern with a very low exhaust port. The port location is the same as 352 - 390 full size Fords but the bolt pattern is unique to the smaller cars.
The 428CJ pattern is used on Edelbrock heads. This uses a higher exhaust port location identical to the 427 exhaust port location. There are 16 bolt holes, eight per side being used for the midsize Fomoco CJ exhaust manifolds. The other eight holes allowed the 428CJ heads to be used as service replacement on the earlier full size Fords and Mercurys with the 427 Low Riser engine.
The Edelbrock heads are an improved version of the 427 Medium Riser design.
Royce |
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