Anyone buying the aftermarket crank bolt from MSA needs to pay attention. I built a new modified L28 motor several months back. Everything new....everthing including the heavy duty crank bolt! It was shaved and shimmed, Isky Stage III.....no expense spared. It ran beautiful with some nice gitty-up. One problem.....between 1600 and 3000 rpm it had a chain type noise. I pulled the new engine down to try to find the problem......the crank sprocket had loosened the woodruff key. No problem, must be