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The Ford V-8 Engine Workshop
Y-Block
239, 272, 292, 312

Factory bore/stroke combinations are shown in bold

Y-Block
Bore Stroke
  3.11" 3.30" 3.44"
3.50" 239    
3.63"   272  
3.75"   292  
3.80"     312

The Y-block piston is flat topped. The piston pin is a sliding fit in both the piston and the connecting rod, secured by snap rings. The connecting rod features 3/8" bolts.

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