Cool,Thanks
It make sense and is worth a try if it's leaking at the flare. I hope he doesn't have 37 degree fittings mixed up with 45 degree?
You can get valve grinding compound at any auto parts store I would think.

Yes I know who Ken is, ran his cly heads on one of my hemis a long time ago.

---

Heads-Up point on the flare angles!! Should be able to spot that visually and a good thing to look at.