Quote:
Originally Posted by V8COOPMAN
The part numbers that have a "18-" prefix are V8 parts. Parts with a "B-" prefix are 4-cylinder. Some parts COULD be marked with both prefixes, and would be common to both types....4s and V8s. DD
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Ford part numbering had all parts that were common to both V8 and 4 marked with B prefix. Parts unique to the V8 were prefixed 18. Did they ever make a mistake, probably.
Charlie Stephens