1 3/4" Headers Verses 1 7/8" on a Healthy 408....Is There a Big Difference??

Sometimes you have to live with what you got. My short exhaust system is fabricated/welded and positioned in such a way in unison with my 1-5/8" Dougs that, unless there were 1-7/8" headers out there that were identical, my bed is made.

yep
the headmans are the only way i would upgrade, and they require cutting, so....