Riv, I don't think you're understanding this.
You cannot support a 2.3" pulley on stock heads and valvetrain. That'* doing some serious damage to your motor every time you drive it. I don't even need to see your scans to know this.
This is exactly the same as running a 3.2" pulley on a stock head/valvetrain setup on a Series 2. You are in MAJOR DANGER.
Get that pulley off the car as soon as possible. Do NOT go WOT with it on the car. You should be running a 2.5" pulley at the SMALLEST, and then ONLY if you've satisfied all this: