Which MSD box?


Like AndyF said many posts ago...your plugs look strange. At first look I thought they were too hot and reducing timing and adding fuel were keeping it from killing itself.


Once we got deeper into it, it seems to me those plugs are plenty cold for what you are doing. That doesn't explain the green tint, what looks like a ton of heat and not being able to see a timing line on the ground wire.


The insulator should be a dull white from the top down to the fuel ring. Most likely, you'll see some clouding on the porcelain from coming up the return road, especially if you don't run a power valve.


The plugs look strange and your timing is also an anomaly.