Header options for a B-engine stroker in a Dart?

I put my engine block in my 69 barracuda with the bell housing, z-bar & clutch fork. The car has manual steering. With very minimal mods to the Schumacher headers they fit very well. I also am going to build a stroker motor. 383 496 ci. I did my home work there is nothing out there for 4spd A body big block cars. Unless you want to do some chopping.