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I do not think that you want to go with no mufflers, you would have to check with your states inspection process to see if that is an option. I have straight flowing Dynomax mufflers on mine and they offer a nice tone with not much resistance or power loss.
Also, with a mild 302 you probably are not going to get the same tone as cars with a much more aggressive cam. Go to the last page on my build and you can hear my engine with the mufflers at low to mid-range rpms. Later this week I will have some video at higher rpms.
Jim
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