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Old Dec 6, 2004 | 08:09 PM
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360 - 390

how can i tell the difference between a 360 and a 390? i was thinking about the 73 f100 i looked at and i thought it maybe a 360. would the 390 be the more common engine in this model or might it be a 360? as far as i know all the blocks say 352 on them a they look the same.........
 
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Old Dec 6, 2004 | 09:18 PM
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they all look the same from the outside.

360s are very common. A safe bet for a gambling man. To get the truth you need to measure the stroke.

3.5 = 360 or 352 (352 less likely, they stopped production in 67)
3.78 = 390

check out the FAQ posted at the top of this forum for more info..
 
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Old Dec 6, 2004 | 09:32 PM
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I believe that the 360's have a key-way type notch and a half-moon cut-out on the crank flange (on the outer area) where the flywheel bolt's up. And the 390's just have the key-way cut.
 
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Old Dec 6, 2004 | 09:38 PM
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Check the VIN number - at leist you will know what engine the truck had when built.
 
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