which is the best stuff to use on my floors before new carpet. also were is best to order new saddle color carpet. thanks

 

ACC seems to have the best carpet in saddle for the Cutlass series. What model & year is yours?
Dynamat is good stuff, but too expensive. Many had good luck with other brands.
Here is a thread that might help:
https://classicoldsmobile.com/forums...rth-waste.html
And another...
https://classicoldsmobile.com/forums...-material.html

 

its a 72 cutlass s . its loud inside and gets real warm from the built 350 i put in. i think a new fire wall insolator would help also, any ideas?

 

Sure, a new FW pad inside will help, but you will also need to do the front floors, as well as the rears, as well as the tranny hump. The exhaust radiates a lot of heat when you are not moving.
See my interior makeover thread on how I did mine. Made a difference!