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Im looking at a 427W shortblock its a stock block 4.17 stroke with a 6.2inch rod, ive heard that if these motors over 4inch stroke arent clearanced right you will have a ton of problems. Does anyone have any input on this?
 

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I had a 414 ci. windsor that I built with a stock block. It was 4.060 bore, 4 inch stroke, and had 6.125 aluminum rods. It definitely had to be clearanced to work. If you had steel rods maybe not so much. I notched the block and the bottom of the cylinders and it worked fine.
 
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