1 7/8 headers on 69 dart?

B3422w5 said

I wasn’t aware TTI made a 1 7/8 step header.
I know they make 1 5/8 to 1 3/4 step
And they make a straight 1 7/8

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You are absolutely correct. I plead temporary insanity. I have no excuse, because all I had to do was look at my 2 cars. My 426 small block (4.125 stroker) has a set of TTi 1-7/8" and my 414 has a set of TTi 1-5/8".