I'm thinking A Body with a 440?
sanderson headers in calif. make a super nice block hugger header for mopar big blocks. I have them on my 63 valiant with a 400. I also have a Alterkation front suspension which eliminates the K_Frame crossover. I also turned them upward and mounted turbos on them. They are exellent quality but a bit pricey. 3/8 flange and 1 7/8 pipes 14 or 16 gage.