need exhaust help

[1974gmc]

i need to get new exhaust for my stepside. its got headers and some temporary exhaust(one foot of pipe and turbo mufflers). i got a qoute for using my existing mufflers and exiting before the rear tires- about $200 canadian. or exit straight out the back- about $300-$350 canadian. the thing is right now im goin deaf every time i drive it, and im worried that if i go before the rear tires that it will still be too loud inside the cab.

id like to know what everyone else is running and how the interior sound is like. im not worried about if its quiet or anything, just dont want to go deaf every time i go out. thanks