Big block exhaust manifolds

Passenger manifold is actually a 67-69 B/C body piece, 2806900, 383/440hp, with no date casting. Drivers side is confirmed 2946729 A body 68-69 383hp with an early 1971 casting date on it...? I'm adding more pics and the price is negotiable, not an auction, the first person to negotiate an amicable price gets them, simple.