I suggest comparing T&D and Jesel before you decide.
T&D should be able to supply either typical shaft rockers (one shaft per head), or their paired rockers (one short shaft per cylinder, like Jesel).
I used the later style on my Indy CNC 440-1 heads.

T&D_installed.JPG
1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1