440. Dart. Header question

rumblefish360 did them on a B in an A body (duster, I think?), and he said he would not do it again. I do not think they would work without a lot of aggravation if at all with the taller RB combination.
B-Body Headers In An A-Body
These are problems that I want to learn firsthand about in ""someday land over yonder"... But I plan on just dealing with the aggravation of Hedman Hussler fender well headers and an ANR engineering mount plate.