I did mine using the “Dynamat” on the inside firewall, floor, under seat areas. I trimmed out the trans cover edge by about an inch on top and installed a new gasket on the trans cover and battery cover. I also sealed the edges of the Dynamat with Mylar tape to keep the butyl rubber from contacting the rubber stock mat when hot . I used the factory firewall mat also, but haven’t done the inner doors or behind the seat or cab back yet.
Putting in the new motor and got side tracked! Will advise when complete.
