
06-11-2004, 06:45 PM
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Senior Club Cobra Member
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Join Date: Jul 2000
Location: Las Vegas,
NV
Cobra Make, Engine: ERA 427 SO
Posts: 1,126
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Not Ranked
Rick, I think you've got the wrong casting number...the Ford number should be something like D1ZX (D for '70s, 4 for 4th year, Z for Mustang, X for Ford Muscle Parts)...but Pat Ganal's book notes that all 428s sold after '74 were bored out 391 truck blocks, characterized by the vertical outside ribs on the block and a 3/8" pipe plug on the lower side of the block for the truck oil return line...
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Ken
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