What Headers Fit?

Hi Everyone! There are a million posts on headers. I spent time looking, but thought it would be easier to ask a question I'm sure has already been answered. I have a 1973 Dodge Dart 440. I cut out the fender walls. Took out the brake booster and went to manual steering. Lots of room. What headers should I buy?

Cast iron heads? Maybe the TTi 1 3/4 headers would be the best for your application.