440 A body header options

I used the Schumacher and TTI headers (http://www.ttiexhaust.com/Category-ClassicHeaders/440-200/TTi440-200_RB.htm). Here is what I discovered, this was in a 71 Dart, RB, Auto.

Schumachers bolted in nice, I started with power steering and had no issues. Power was nice care pulled low 13's on a mild build and 2.5 exhaust.
- What I could have done is grind out the exhaust ports a bit to make a little more power, these are a bit restrictive. Also install, plug changes worked very nice, no issue, this was great header

Same car - I later moved from PS to manual box

TTI's - Install was a PITA, at the time I was rebuilding my trans, so it was out. I had to lift the engine and remove the torsion bars, however the headers fit. I ended up drilling a hole in the passenger fender to change #6 plug. However these headers perform, build more power and sound wicked, I used 3" TTI exhaust with cross over and bullet to back wheels. I believe there are a few videos if you look through my past threads. These are tight and take time to install. MUST have a mini starter and if it ever goes out, you may need to pull a couple of items to change it.

Side note - under hood temperatures. If I ever do another BB A, I will install coated headers to help reduce heat, regardless of header I use.

This is my 2 cents and what I have learned - other may have a different view or better skillset-