Is Quench Required?

I'd go with the .039 quench and not think twice about it. If you get any rattle, tune on it until you get it out. That's what I DID.
Agree, And even if that don't work he could run the thicker gasket 0.059" that he would anyways if he don't try running quench with a 0.039" gasket so there's nothing to lose, this thread just keeps going in circles lol.