How smooth are the block deck and head surfaces? I have used the Titans with the teflon embossed(lined) on a new Hemi block that I didn't have decked that leaked like crazy sitting still on the dyno Took it apart and had the deck cut and smoothed up and no leaky reusing the same gaskets as before.Mopar must have used a cheeze grater to deck them blocks, I could feel the serations with my finger nails I put them on dry both times. SCE does recommend using spray on Hylomar on there non teflon lined copper head gaskest as well as the Titans, I think You could try some Aluminaseal stop leak first