318 Heat riser rattle/tapping

I have a 72 Barracuda 318. The heat riser on the exhaust manifold has consistent rattling, I am under the understanding that it should go away once the engine heats up to optimum. Mine seems to keep going, its rather embarrassing. I heard you can weld/tap it open or you can remove the riser completely.

What is the best option / easiest and can someone guide me through.

thanks

jc