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Just a quick question I have a engine block with 352 stamped on it and that is it. Someone told me that this is a 390 block and that the 390's used the 352 blocks. Is this true, I don't know the answer to this one. Thanks ahead of time for your help.
 
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I believe that the "352" was just a casting mark/number on the block and they never removed it. That is why you see it on so many blocks.
 
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Yes, 428's as well.

http://www.jps.net/binay/webdocs/Images/mustang01.JPG

"Sometimes a man's life can depend on a mere scrap of information."-The man with no name
 
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Most of the FE blocks are cast with 352 on the left front, the engine can range from a 330 to a 428 CID. The best way to I.D them is to measure the cylinder bore, and check the casting number on the crankshaft. The casting numbers on the block can be misleading. It's most likely is a 390.

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