Originally Posted by
rob8210
Hey guys . I was wondering , I have a 1979 f250 4x4 with a 351m, it has the small distributor cap, and any I have seen have the small cap as well, yet when I go into a parts store such as Napa , their books say it should have the big cap. You guys with 'm' motors which distributor cap does yours have and what year is it? Thanks
Someone changed the distributor, using one from a 1976 or earlier car/truck.
The same V8 distributor cap is used on
all 1977/79 Passenger Cars, F100/350's, Bronco's & Econolines, regardless of what size the engine is > >
E2ZZ12106A .. Distributor Cap (Motorcraft
DH411). This cap is grey.
E2ZZ12A217A .. Base Adapter (Motorcraft
DJ6) / Use w/E2ZZ12106A Dist Cap.
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D5AZ12106A .. Distributor Cap (Motorcraft
DH354). This cap is blue.
Fits: All 1975/76 V8's.
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B7A12106A .. Distributor Cap (Motorcraft
DH6). This cap is black.
Fits: All 1957/74 V8's.
D5AZ12106A can be used in place of B7A12106A and vice versa.
D5AZ12106A replaced B7A
Z12106A, which was the (brown) HiPo dist. cap used from 1957 thru 1973.