440 duster

how come the factory 440 manifolds wont work?? or mounts?? or where can you buy the headers @

Factory 440 A Body manifolds are expensive, hard to find and dont flow well.

Factory BB mounts require a a BB K frame. Also hard to find and expensive.

The Schumacher mounts and there Tri Y headers are the easiest way to go. There are other header option but they are harder to install.