[raceron1120]

You might check out Porter Muffers too, they're heavy, steel vs fiberglass packs, and are US made. I put a set on my Yblock and they sound great, and with a lot of bark when I get on it.

If you can't find one elsewhere, Clark up at West End Welding in Minnesota (home of Porter Mufflers) might be able to help you out with the correct crossover/tube to use with your original manifolds too. Maybe give him a call? He's very helpful. I think his phone # is on their website.

He had a set of NOS Belond headers for my 292 so I got them along with a pair of mufflers from him. I wanted to also get a set for my next project ('47 superdeluxe) but he didn't have any flattie headers left.

He put a video and sound of dual porters on a '48 flattie on his website, you might want to check it out.

Here's the link to Porters: http://www.portermufflers.com/

And here's the YouTube video of '48:
https://www.youtube.com/watch?v=UjNYSbdq4Ek