I second RicRaw on the Remflex gaskets. I have them on my wedge running hookers and Eddy Performer RPM heads. No leaks and lots of crush. Supposed to be reusable but I haven't tried that yet. They are pretty thick (~0.250") so if your fit is really tight, they might make things worse.

1972 Pro-Street 'Cuda, 500" Eagle stoker B Block, Eddy RPM heads, Victor Manifold, 850 Mighty Demon, Hemi 4 Speed, Dana 60 w/4.88 gears - Built by Hansen Racing Middlesex - NJ