best headers??

Here's what is in my A-body's
73 duster 440 Schumacher's basic stock engine runs 11.59
67Dart nicely built 440 tti's 2" runs 10.11
73 Scamp Headman B-body headers really stock 440 runs 12.30
68 dart 2" hooker supercomp 496 ran a best of 9.59