Help! 72 Duster 340 V8 Exhaust Manifold

I inherited my dad's 1972 340 (the V8 version) & it's actually in pretty good running condition. I need the exhaust manifold for on both sides, but not sure exactly what they're supposed to look like. There's some custom bent stuff on it right now that's causing overheating & melting-maybe missing the heat shield, not sure).

Are there any diagrams out there? Other advice? Thanks!