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Old Dec 6, 2006 | 06:56 PM
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65'f1004x4conver's Avatar
65'f1004x4conver
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352 with 390 crank?
is it possible to put a 390 crank in a 352 if i used the 390 connectiong rods?
 
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Old Dec 6, 2006 | 07:12 PM
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Yes, but then you need special pistons to maintain proper deck height. Better off to bore the block .050" to make it 4.05" bore and use the 390 pistons.
 
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Old Dec 6, 2006 | 10:23 PM
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you dont think that would be taking it too thin
 
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Old Dec 6, 2006 | 10:53 PM
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4.050" is standard bore for a 390. I may be wrong about some of the early blocks, but I think the 352 used the same cores as the 390. The 360 is the same 3.50" stroke as the 352, but the 4.050" 390 bore. Kinda makes sense, one block, one bore, different cranks, until you get to some of the bigger, more expensive engines. I think that's how Henry made his money. LOL
 
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Old Dec 7, 2006 | 12:26 AM
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Standard over bore back in the 352's day were +.030" and +.060". So I see no problem going .050" ever as the core shift problems had not really been a problem yet.
 
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Old Dec 7, 2006 | 12:47 AM
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Is it .050 or .060 to convert 352 to 390? Don't want to act dumb...but I could swear it's .060.
 
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Old Dec 7, 2006 | 01:05 AM
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It's .050". 360s and 390s have a 4.05" bore while your 352 has a 4.00" bore.
 
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Old Dec 7, 2006 | 08:04 AM
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thanks, i just may do that since i already have a set of 4.05 flattops just sitting there
 
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Old Dec 7, 2006 | 08:39 PM
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It would seem good to go the next oversize on the piston for the bore. This leaves room for additional boring later if the engine needs it.
 
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