Although this thread has been an ongoing for 
  years,, When it came time to put headers on my Gremlin, I finally decided on 
  the Hedman headers # 98316. The quality and fit were great, and the "ball 
  socket" type muffler flange mount they have is pretty nice. Keep in mind from 
  my previous posts, I had bought every AMC header that was on the market (4 
  sets), so I could try each one and decide what was best.These went on a 1973 
  Gremlin with factory V8 automatic set up. I switched to the 727 tranny.  
  Although the Dougs headers (# D103) would have been my choice, they were 
  within a 1/4" of touching the tranny once mounted, so the hedmans turned out 
  to be the best overall. If you have a manual tranny, then the Dougs would be 
  nice. The Hooker Super Comp headers # 7105HKR fit also, but I felt the high 
  price of them was not worth it. The Edelbrock shorty Headers # 65813 just 
  would not fit at all. I also went with the McRobb mini starter because of 
  clearance/installation issues.. After trying for hours to get any of the 
  headers to go in with the factory starter, I gave up. 
  I had many set backs on this project over the last couple 
  years, but I finally fired it up last Saturday and it sounds and seems to run 
  fantastic, so all was worth it. With any luck the restoration should be done 
  soon and I'll have it on the road by summer.. Here are a couple pics of the 
  underside and engine compartment.. I posted a video (cheap camera) of the 
  engine running on youtube,, so you can type in "1973 AMC Gremlin first 
  fire up" and it should bring you to the video of the engine 
  running..
  Bob in MN