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Old Oct 27, 2006 | 05:22 PM
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M6EV139445's Avatar
M6EV139445
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Stroker Y-block

Several sources confirm that the 239 Y-block has a 3.75" stroke. It seems like a 'gimme' to put this long stroke crank into a 292 to make a 331. Has anyone done this?
 
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Old Oct 27, 2006 | 06:53 PM
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It's only 3.1". It was occasionally used to DEstroke Ys for class racing, back in the day...but there are some details necessary to do it.

The most common way to get a stroker Y is to start with a 312 crank & offset grind it, using the SBC rod dimension.
 
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Old Oct 27, 2006 | 08:07 PM
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I bet your looking at the '39 - '53 flathead 239, 3.1875 bore x 3.75 stroke. Not a y block.
Andrew
 
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