67 Barracuda - question re: carpet cost and considerations

I am considering to purchase a 67 Barracuda it is an automatic with floor console, I have not seen the vehicle yet but I know there is no carpet (seats and door trim are there). I don't have experience with this so I would appreciate any comments:

a) What is typical cost (range) for carpet that is average/vg? It doesn't have to be anything special, color would be black. Are there any recommended sources?
b) What are the other considerations for NVH/firewall/other? When I see the vehicle, are there any particular sections of interior sheet metal I should look at more closely?