Head gasket getting oval?

By the pictures it looks like that gaskets are warping because of compression. Looks like you're using the pistons from Hughes for the 426 kit. With that kit you shouldn't have more than 11.0 to one compression, and that's pushing it. However with that said these pistons are unusually shaped with the big dome at the top, which is where the gaskets are bowing out. How bout you try the Cometic MLS (multi layer steel) gaskets and see how they do. Small block Mopar's have a problem with head gaskets and high compression due to only having 4 bolts per cylinder instead of everyone else's 5 bolts per cylinder. I'm using Cometic's at the present and I'm pushing 13.1 compression with no problems (yet, I hope). Anybody else got any ideas?