If you can lay hands on the old style cast , Mopar headers Dave.Snatch 'em up.
Everybody back in the day took 'em off for tube headers that rusted away.
And gained only a couple HP at best. Chrysler was ALWAYS the best at flow design. I worked for an Chrysler engineer that went on to design the open chamber SBC head. Also the Mopar Indy engine.
He was an engine flow Geenius!

"wanna hear God laugh? Tell Him you have complete control now!"