Re: Insulation material
I installed the firewall insulator last year when I insulated the front "cab" section of the car. FW insulator was the first part of the job, needed a little trimming and different bolts for the junction box, removel of choke rod and gas line and any other "things" you may have tucked out of site. BIG difference in sound and heat, made my wife very happy. Even better results with the cowl and floors undercoated and insulated. I would go for it. See post #21 for what I used, I'm doing the back half of the car now.
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