The standard Hedman headers you get from Summit Racing extend too far back under the car, and you have to use "S" pipes to get the pipe back up to the side pipe location. This puts not one, but 2 passes of exhaust pipes under your feet, and is VERY low under the car.
It ain't pretty, but you have functional side pipes.
The better solution is to either get headers that have a 90 degree collector for side pipes, or get shorty headers so you can turn out the side right off the downspouts. This moves all of the heat to the outside of the car and away from your feet.
The best solution is the Hooker headers that send all 4 pipes to the side of the car where the collector is outside the body. This moves 90% of the heat to the outside of the car and away from your feet.
I have put the Patriot headers and Headman headers on a 82, and they look cool, but cook your feet.
I have the Hookers on my 72 and even with the big block, my feet stay comfortable, not cool, but comfortable.You can see the Hookers in my avatar.