Trump, as MBHD has stated we used them in circle track racing for acceleration off the corner; as also stated the heavier counterweights smooth some of the torsional effects of the crank....if you are building a primarily street engine then I would use that crank in conjunction with the small 153 tooth flywheel found in passenger car apps(or an original 26# Z-28 flywheel if you can find one)....I have been told that the 802N indicates a nodular iron crank (higher graphite content) but I've never seen any factory documentation to support this....fats
