They will answer, everyone is business.
The question, though basic, has a simple and a complicated answer!
Simple Answer First.
The round bodies will take any 200 header designed for a 1960 to 1980 X-shell Ford. Thats anything with the uni body and coil over A arm suspension. Ie Falcon60-70.5 , Comete 60-69, Fairlane 62-68 , Torino 69-72 (uni body), Maverick 69.5-78, Granada 75-80 , Monarch 75-80, Versailies 75-79 .
Complicated Answer Second.
When you have a 250 six, a specific header is required, and its difficult to define what one will work. You can get headers from Hooker and Clifford, as well as FSPP. There are conspiring issues with starter motor and drag link and frame rail contact if you are trying to use them in early Fords from 60 to 62.5. Ford reworked the internal structure to incorporate the Fairlane plenumb, firewall and drag link parts.
Happy hunting!