Has anyone used these gaskets?

Or is their another good copper gasket. I had the fiber gasket blow out on me in about 5000 miles.

LONG EBAY LINK

MADE IN "USA" WITH CORRECT PORT SIZES!!!! Embossed Reusable Solid Copper Header gaskets (2 pieces per package) for AMC (1970 - 7 290-304-343-360-390-401 WITH DOG LEG PORTS (NOTE THAT THE 1967 THRU 1969 290,343, AND 390 had square ports. Embossed O-ring gasket design increases sealing pressure around exhaust ports to create a tight, leakproof seal, even on irregular surfaces. Made from long lasting .042" thick solid copper, these gaskets will not shrink, deteriorate or blowout, so gasket leaks are eliminated. *** For more technical information call 1-815-978-0000 ***PLEASE ENTER YOUR ZIP CODE IN THE SHIPPING CALCULATOR AT THE BOTTOM OF THIS LISTING FOR EXACT FREIGHT COSTS!!***


-Paul