Hot Rods Header Advise for Dart Iron Eagle 165 Runners

I need to get Shorty Headers ( Sanderson cc1 ) tight fit because of frame rail clearance issues. My Iron Eagle 165 Heads are Square Port with a raised boss, similar to a chevy vortec head. The Sanderson Headers have a round Port. Will the round port header fit the raised boss square head, need help on this one guys, my project is down till I get the right headers, Thanks for any input, Stan