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Discussion Starter #1
I have a 66 Mustang with a the following engine stamping (D1AE-6015-DA 12) Can anyone tell me any more about this engine? I know the following: D = 70's, 1 = 1971, A = UNKNOWN, E = Engine, 6015 = Engine, DA 12 = No clue??

Any help would be greatly appreciated. I was told it is a 351 Windsor
 

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Check here ,
 

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easy way to distinguish between 351 W & 351 C is the spark plug size. 351 W takes the small 5/8 spark plugs. 351 C takes the bigger 13/16th spark plugs
 

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Discussion Starter #6
After cleaning up the block, I found the following numbers on the top of the block, 351 WF12 + 0 Can anyone tell me what this set of numbers means??
 
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