Hemi Dart headers

8)I Am building a 68 Hemi Dart , right hand drive ( i live in Australia) .Aluminium block , stage V heads 540 ci . I have coil over suspention in the front using the CAP upper and lower arms so torsion bars are gone . Hooker Super comp adjustable seem to be the only ones available , they look fine . regardles i will need to modify for RHD. Any suggestions on other types available ? Thanks