Usable Headers/Exhaust manifolds

Thanks Uhcoog1, that is a great list.
I should have mentioned that I have the complete HemiDenny K-Frame set up now. He does mock up with Jeep 5.7L manifolds and everything clears. I was just curious about anything else that my be close on a factory A-Body. I don't want to modify the frame or firewall, but the steering is out of the way on mine.
Thanks again for that list.