Here are some pictures of W2 exhaust rockers compared to standard small block - both iron and Crane/Mopar roller rockers. The W2 rockers are a little longer that standard small block rockers. Order left to right are standard, W2, standard, W2 (blue)
I tried to use a set of 16 W2 exhaust roller rockers on a small block and they were rolling off the car end of the intake valve. I always read the W2 exhaust rockers were interchangeable but now I have my doubts.
This may not be the main issue with the current set up but it may be another to look at as you try to get things straightened out.
View attachment 1715591185 View attachment 1715591186 View attachment 1715591187 View attachment 1715591188