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360 or 390???

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Old May 28, 2002 | 07:08 AM
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75explorerxlt
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360 or 390???

 
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Old Aug 15, 2002 | 10:35 PM
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thndertruck
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360 or 390???

Ok all, I measured the stroke from the top of the piston (at lowest point in stroke) to the top of the cyl wall. I did this in all 8 cylinders and came up with 3& 3/4in for all cylinders. Is this the correct measurement points or should i re-check it. There is no ridge at all in any cyl. If this is correct could someone have mixed rods & pistons from a 360 & 390?

Any help will be rewarded with many years of no mechanical breakdowns and many years of happy FORD life.
 
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Old Aug 15, 2002 | 11:48 PM
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big block power
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360 or 390???

390s have a 3.78 stroke so 3 3/4" is pretty darn close,
could very well be a 390, if you get a more acurrate
measurement you will find out for sure.


Fe power
 
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Old Aug 16, 2002 | 05:59 AM
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360 or 390???

My 360's pistons were .125 in the hole at TDC. If your engine was this way also, it would be closer to 360. Measure the piston at TDC, then at BDC, and calculate the stroke that way and see what you come up with. Hope this helps.:-)
 
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Old Aug 18, 2002 | 12:29 AM
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thndertruck
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From: BOULDER CITY USA
360 or 390???

Thanks for the help guys. I already put the heads on, so I will have to try the "hard wire through the spark plug hole" trick. Hopefully it will cool down soon here,(its been 105-120 durring the day and 90-100 at night) then I can get back to work on it. Again thanks all.

 
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