Heat Shield ‘70 300

So I was cleaning up a bit after running the motor for the first time and I noticed this funky discoloration where the rear seat would be, just over the muffler. That must have been a lot of heat, I’m wondering if there is supposed to be a heat shield over the muffler at that point to prevent my passengers from being uncomfortably cooked. I don’t see anything online or in the parts book for a heat shield, could I just fashion something out of sheet steel, or has anyone retro fitted from a...

Heat Shield ‘70 300
Author: Samplingman