What are the best header gaskets? I used the white FelPro manafold gaskets that blew out in 2 weeks. I went to local autoparts store and they said the best ones were the MrGasket copper header gaskets for $50 /forums/images/graemlins/eek.gif. Is there any special ones I should be looking for? BTW, 454 and DynoMax coated headers. Thanks for helping!