Well, the Cometics did not work at all. Poured out like spilled coffee. In looking at these Stealth heads, I see a lot off residual oil in the heads. The path to the oil return is not as good as stock heads and the holes are much smaller for drainback. A good sealing gasket is going to be a must. The Carbon Superperformance have worked on two other stock head and valve cover builds. These Cometics did not fit the tin stock covers with a good seal. I’m going to put studs in the heads for better thread engagement and have ordered some Fel-Pro fiber/ rubber for some more squish on these surfaces. Hope that will work. Right stuff sealant on the VC side and I hope it will work.

I bought these Carbon x from Mancini. They did not recommend anything else. I guess I should have called the manufacturer.