Best "no problem installing/clearance header

Hi all, I want to install headers on my 68 Dart auto w/340-no power steering or brakes, I am not looking for HP gains as I know long tube applications are best. I am looking to avoid installation and clearance issues primarily.

I would imagine that my combo of no power and automatic is common so I am hoping to tap into this pool of experience to me get this right the first time around.

Feedback welcome.

happy holidays to all.

Ken