Heat and sound insulation

[white90burb]

Ok so on my 75 blazer there is a lot of noise and heat in the cab. Obviously doesn't help that i have no carpet and all the gaskets and seals are missing or bad. I will be replacing the seals and gaskets eventually. But I am looking for the best way to keep the cab cool and quiet.
Right now I am working on getting the ac working bought all new components. I have resealed the ac box on the engine side completely to keep the air where it needs to be. Next I will be pulling the inside air box apart and resealing all the vents ect because air flow from the vents is not great.
So I figured while I have the air box out it might be a good time to put some sounds deadening heat insulation back in there...all the factory stuff is gone.

This truck will be getting a 6.2/6.5 engine in it eventually so I know those are loud. When I do the swap I will be wanting to cover the engine side of the fire wall to help as well. So what materials will help make this a more comfortable ride. Also being a full vert I've never seen any headliner on these trucks. Is there any way or anything to put on the top to reduce the head coming in. Keep in mind I live in Phoenix and it gets hot.

 

[JoshHefnerX]

If you're going to put carpet back in there, it would help.

There are some good posts on another forum I'm on about sound deadening. pm me if you want that.

If you want really quiet, you put down a cld layer on the floor, a layer of closed cell foam and then a layer of mlv over the top of it. The cld helps to dampen the ring. The closed cell foam and mlv then form a 'floating floor' which acts as a barrier. Then lay carpet over the top.

Right now the best bang for the buck is Knukonceptz kolossus cld. You can get ccf from a place called foambymail.com they call it 'gym mat' in 1/4 or 1/8 in thickness. MLV, places like sound deadner showdown have some, or you can go cheap and get db3 from home depot - that stuff isn't as flexible but much cheaper.

If you have any questions let me know.

Josh

 

[375 H&H]

I have a Suburban with 6.2 and I've had good luck with a coat of Herculiner on the floor, covered with FatMat Rattle trap, a foil backed butyl rubber sound/heat deadner, then pad and rubber floor mat. I also stuck the FatMat on the engine side of the firewall and underside of the hood. will do the inside of the roof someday.