I took all my stuff to a local place called "Rocker Arm Specialists" to get it checked out.
My 92 Zuk came with 1.3 ratio arms.
MY 88, 89, and all other early Zuks I have worked on, have had 1.45 ratio arms.
From what I havce found, the EFI cam has taller lobes and smaller arms. The carbed cam has smaller lobes and larger arms. The difference is obvious when put next to each other.
I put the larger arms on the larger EFI cam. Now I have a good idling engine that passes smog and kicks butt! Just check for clearance on the valve springs.
This netted me .375" lift @ the valve.
For the guys who are running regrinds, those cams have a smaller base circle. This changes where the wear pad on the rocker arm the the cam lobe meet....reducing the arm's effective ratio.
I don't know if the arms on my Zuk were changed? I bought it in 97 with 58,000 miles on it, so I could only assume it was stock.
Hope this help someone.