You can buy tabs that fold over the bolt head after they are torqued.
I had the same problems.
Mine keeped loosening up, so I installed new hardware fold over metal tabs, red thread lock, & then JB weld on top of the bolts including the fold over tabs.
I have not had them come loose yet.
I had this problem w/manual trans & autos.
Main problem w/mine was running a stock damper, when I switched over to a Chevy V-8 damper all the sudden it ran smoother & also higher RPM.
You are running a Fisher/Vector damper correct?
I guess they work OK?
Your crankshaft is the fully counter weighted one correct?
I would think it is even more critcal to zero balance the crankshaft having 4.120 inch of stroke compared to mine @ 3.53?
