Headers fit in 71 Duster /6 that has Spool V8 K member

A friend of mine has a set of hooker headers 5204 for me. I know they fit 70-72's. I have a 71 Duster. It was originally a /6 car, I am going to put in a 340 with a V8 Spool K member. Will the headers still fit? Thanks.