I haven't made much progress because it was too cold for me to work on without my fingers freezing and i was distracted by more important investments(bang!)...anyways i bought a palm setup with .MMCD, works great on the 91 MM but with this 87 ecu it cannot communicate.....
Finally pulled the valve cover.... some of the rockers have a lot more play then others, all of them except the ones the cam has pressure on are at least a little loose. I will be looking for used hlas locally

https://www.youtube.com/watch?v=1Hby...e_gdata_player