Rick,,the fes all had the same size bearings,,rods are the same width and lenght as well,,later 427's and scj's use the same rods,the bolts were beefier,studs in the better ones,,lemans had heavier rods yet,the difference is the
oil galleys in the cranks were opened up and flowed more ,lots of
oil pressure and lots of
oil,,oem pump and 5 quarts wont work,but the bearings and rods will all interchange,,no diff in the width or design,most racers now use chevy rods,not so much because they are best,,but they are strong and light,,and off the shelf,,ie :cheaper,,oilflow oil flow oil flow,,it is all that,,,:} Tk