Stage IV-VI B/RB Wedge Rocker Arms

Dear GTX John / Kim

The heads I have right now have all straight Crane rocker arms. I was told that these heads are Mopar Performance stage VI but they are cast Iron.
Cylinder head casting is a 4532287.

When I ran my stage IV heads many years ago, I believe I had to run offset intake rockers if my memory is correct.
When I test set up these heads on a 440 motor the 3/8 pushrods, intake pushrods are very close, and some are slightly rubbing against the heads. I could probably run 5/16 pushrods on most of them and have a little bit of clearance. I would like to stay with the larger pushrods of possible. These heads are really ported, and I do not wish to clearance the intake port anymore unless absolutely necessary.

I am looking for any information on these heads. Please let me know if you have any information on these heads.