Here is a link to Speed talk . Its on the second place Engine Masters 289. I think its worth reading all 4 or 5 pages of it . It goes on into some discusion on 289 vintage spec engines for both FIA and vintage racing here in the us also. After reading it let me know your thoughts on who you think is build the engines for Cobra automotive. Sound like they might work with one another.
https://www.speed-talk.com/forum/vie...hp?f=1&t=58737