I don't know exactly which heads you have but i think the Brodix 60/40 heads take the .250 intake off set rockers. I know my Brodix 10's do and T&D has a great customer support system, unlike Jessel who to me just don't really care.
Below is the link to T&D maybe you can pick out your heads by the #'s and it will tell you which rockers you need. The T&D's that i got are really nice.
JMO
Zip.
http://www.tdmach.com/page6-7.shtml