[MikeK]

I vote neither!

There are two new gaskets from "Best" gasket company. One is copper with a black non-porous filler far superior to the stuff in a FP-7013 R3. The other is two layers of a kevlar reinforced material bonded to a steel core, with steel fire rings. You can read about them here: http://www.bestgasket.com/about_our_products.asp

With the known narrow weak spots and seepage problems with the fel-pro, and the blowouts with the modern silicone, I see no reason not to try something else. I have one of their copper gaskets waiting for a call to duty. I can't wait for an opportunity to use it.

H & H sells the Best brand copper ones. If I were doing a repair with a block that was not within a few thou. of flat, or somewhat scratched and gouged, I would probably try their kevlar/graphite/steelcore gasket.