My car has a header leak. Im getting some popping from the exhaust when I let my foot off the gas at speed. I have a magnum 360 in my 71 valiant. I used my out LA style header, but I have a leak on the #1 header tube. Im using LA style gaskets. Do you think using a magnum header gasket would help seal it better, and is thier any kind of a high temp sealent the could help. Any ideas?