Hey guys,
I have been holding off on this thread until I was sure of an answer. John brought his heads over to me last week to take a look at. I was hoping I could sell him a set of Marks "New Olds Performance" rockers that I had here that would not work on a previous build. But that did not happen, the rockers would not work.
I have a bunch of test rockers and I found a Harland Sharp one that was as perfect as you could get using his .505 lift cam. Unfortunately I had not marked a number on it so I sent it to Harland Sharp to figure out what it was. I just heard back from Randy at HS and it is their 5003 rocker.

So if anyone else is going to use the Speedmaster heads the Harland Sharp 5003 rocker appears to be as perfect as you will get.

 

I still had to remove the baffles out of the covers.