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6.58 rod is wider at big end & must be narrowed to fit 351w crank, tunnel dia is same & clevo 351 brgs fit straight in. Rod bolts for 6.58 rod are approx 0.200" longer than 351c.
Built a couple of 400 cu in strokers in 351w blocks using these rods & 400m crank plus a 0.900" pin height pistons & reduced base circle cams---- lot of work.
351w crank with 6.58 rod & 1.165 pin height piston from 331 stroker would be a nice unit... piston pin bushes from 272/292/312 'Y' block press straight into 6.58 rod small end & suit std 351 wrist pin.
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Jac Mac
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