Replacement manifolds for 360 in a 74 Duster?
Would just be careful of expectations, seeing as these "new" units already have signs of rust, look very porous, have casting defects, and are missing the heat riser all together. Straightness of these repops will be important, otherwise it may result in exhaust leaks from the onset, and can end in cracking upon initial installation. Hopefully some members can provide you some direct personal experience with the product this vender is selling. Venders usually pick their "A" set to advertise with, who know if that is the case here, and maybe the rest are even worse.