Mr. Gasket HEADLOCK Locking Header Bolts?

I've used the Stage 8 for over a decade and they work great, but the clips can be a pita getting on and off.

The Mr Gasket HEADLOCK are solid bolts like the Stage 8, so no coolant leaks on a 440, but what about staying tight? Anyone had them on headers for a few thousand miles with plenty of hot/cold cycles?

Run studs where you can.We changed all ours back to studs.Even my aluminum heads are studs.I think we had to run 2 bolts total.As for coming loose when I ran bolts I used reg Mr Gaskets and they never were loose.Rocky