Help! Need manifold ideas ASAP. Car going to shop at 1pm today!

Thanks for the advice. Much appreciated. I'm 99.9% sure those headers fit a "B" body. I took for granted, the headers slightly attached to the block, "fit the car" when I bought it. They literally drug on the ground mostly mounted. Didn't see it on the lift.
Anyway. Found some exhaust manifolds off an early 70's dart for drivers side and off a early 70's duster for passenger. Made it to my appointment and had the exhaust installed. Started her up for the first time tonight. Which is a whole other story. Let's just say it "almost" equals giving birth (lol! The pregnancy lasted two years though!).
I gotta say, after always having headers in a small block... I will never go there again. 10 min spark plug change, no fighting or cursing... I'm in love with these manifolds.
Again, thank you everyone.
If anyone else gets stuck on this as well, look for the manifolds with the high rise. Message me, I'll send a pic. ;)