If you want to see slant headers in person, I have on hand.
Clifford shorties
Clifford Long tube (early "A")
Aussiespeed long tube (early "A")
Clifford long tube (late "A", and "F")
Mopar performance, by JR (6-1 late "A", and"F")
I've had Aussie Speed directly tell me those long tubes for the early cars will not fit LHD cars. Since you have a set, what do you think? Have you had them on anything?