Fender well headers

Hey everyone,
I am preparing my 65’ barracuda for primer in the engine bay. I got to thinking that I should prolly cut some openings for the fender well headers before paint. Dilemma is not sure which headers I should plan for and what sized opening I should cut? Great pics on here but measurements would be greatly appreciated. I am leaning towards Hooker super comps. Figured I’d ask the experts. I’ll be running man steering, 360 magnum, 904, and sticking with torsion bar setup. Thanks everyone.