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Old August 14th, 2011, 03:39 PM   #1
jandrold
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I have been looking for awhile but still have not been able to find out how to tell a 390/427/428 apart other than tearing them down. are the two bolts on the R/side just above the oil pan any help? its a C6ME-A 352 block.
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Old August 14th, 2011, 05:46 PM   #2
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Remove a spark plug and measure the stroke using a wooden dowl.
3.50" = 352-360
3.78" = 390-406-427
3.98" = 410-428

bore measurement will tell the difference between the choices.
if it was cheap its probably a 352 or 360.
i got this info from ford truck enthusiasts .com
good luck
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Old August 17th, 2011, 11:14 AM   #3
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The code you have equates to a 1966 Mercury engine. The only way to tell which CID is by measuring the stroke as stated above. With the engine code you have, the only CID it can be is 360, 390, 410 or 428. Good luck
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Old August 17th, 2011, 11:26 AM   #4
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IF its never been apart there is tag by the coil on most fords. you may get lucky and find it.
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Old August 17th, 2011, 02:47 PM   #5
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I don't believe these motors were only used in Mercury's.

Pickups only FE engine was a 352 until 1968. From what i've read all FE's are cast with the 352 on them.
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Old August 18th, 2011, 10:14 AM   #6
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That particular engine was a Merc due to the code.

C = decade
6 = year of decade
M = car manufacturer
E = Engine

The 352 = fe block
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