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I used Dynamat Xtreme to line my cab and firewall. It was very expensive, cost me about 500 bucks. But as far as sound protection it amazed me how much it cut down sound. I haven't had any heat tests yet, but i have seen tests down at shows and demonstrations. It looks like really good stuff, if you can afford it I think it do great in your truck.
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'69 CST Short fleetside
Lowered, 400 small block, 700R4, 4 wheel disc brakes, front sway bar & rear camaro sway bar (in progress)
'87 V10 4x4 Short Fleetside
Quad Suspension and Dual Tanks
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