Sound Deadening

[Mattman2010]

I have an 84 crew cab that I need to install some sound deadening into. I'm not sure if this is the right section to post this so it needs moved feel free to move it. What is the best kind of sound deadening to use to kill engine noise? I have a bunch of noise coming through thr firewall and I am not sure what to use to kill the sound. I have been looking at dynamat and dynapad but they both seem to be more high frequency noise killers and vibration noise killers. So what would be my best thing to put under the dash and maybe firewall to help kill the engine noise?

Thanks, Matt
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