TTI Shorty Headers VS Doug's Long tube headers??

I have a 408 Stroker with the aluminum heads on order from Blueprint for my 69 340 Dart and they stressed that I really need headers. I have never owned a car with headers before. Cost aside, what are you opinions on the Doug's (Doug's Headers D453 Doug's Headers | Summit Racing) and the TTI Shorty's (https://www.ttiexhaust.com/TTi34025.htm). My main concerns are ease of installation and clearances. The car is also a 4speed. Whatever I buy will be polished & ceramic coated. Looking for your experiences as anything from stock is new to me. Thanks

TTI, 1-3/4 - 1-7/8, Long tube headers.
If you’re using a high quality high flow muffler, 2-1/2 will do.

Shorty headers are a waste of time, money and power.
The smaller header @ 1-5/8 chokes power up top a lot.
Small tube header is a waste of time, money and power.

Ease of install?

No such thing. Get over it. Your going to curse and scream while inventing new cuss words.

The TTI tube number 7 is a PIA until you get it done and the. Your going to want to shoot yourself repeatedly when you realize how you went about it wrongly and it becomes simple once you have done it.

I suggest a TTI exhaust and for a max power output, a straight through muffler.

Hooker Aerochambers are a very good chambered muffler for this.
Hooker/Dynomax/Borla - etc… have straight through sound absorption mufflers/glass packs but with a big body for more sound control, are the winner in power making & the only mufflers I’d consider @ 2-1/2 with your engine.

Get the long big tube TTI headers and stop fooling around.
You’ll be happy in the end.