340 exhaust manifolds???

dart gt said
Can anyone tell me what these manifolds fit.Part numbers are 2863553 and 2863543.A guy wants 200.00 dollars for set and says they are 340 manifolds for an A body.Dont want to buy them if they don't fit.Thanks

2863553 = '68-71 340 A body

2863543= Don't have that one...do have 2863549 ..could it be that? If so, that ones '68-71 340 A body as well, so they are gennie's.