The only way I had goodluck from the flywheel bolts from coming loose was use red locktight,metal foldover tabs,then on top of that I used JB weld over the bolts & foldover tabs.
But all this shaking & coming loose was due to using a stock L6 damper,after I used the 8" HP GM damper,my engine totally smoothed out.
Yes ,if you use countersink screws on the clifford timing cover,it clears the damper.
MBHD
