Curious what's out there for a header for my 440 dart sport

78030 (B-body) works with a low-deck in '67-76 A-body and a manual steering box. As already mentioned in this thread, see the BBD Tech Pages. The dings were quite small and not many of them in my '72 with 451.

BTW, #6 plug is next to impossible even from under the car unless you have an extra joint in your forearm! The easy fix is to hole-saw a 1-1/2" opening in the fenderwell directly opposite the plug. Then you have access. Just put a metal (not plastic, ask how I know) hole plug to keep wheel splashes out of there.