Finally did it. I had fuel leaking from the pump top so I bought the Bosch seal kit and replaced the seal around the fuel needle( the green o-ring?). While I was in there I ground off the afc "foot" (thanks to the excellent virtual grind in wanna diesels gallery) trimmed the fuel shut off solenoid down to the metal and then I ground about 1/10 of an inch off the manual shut down lever on the inside of the pump. You will need to adjust the allen head screw on the shut down stop to make sure it will shut off when lever is pulled.
I used to hit about 34 psi on diesel and 38 with water/meth. Now it is getting 38 psi on diesel. Since I am over the 10 hp per psi rule did I really pick up 40+ hp? It will BURY 1500* now quickly when 100% pedal is applied. It's fine 90% or less.
Now the truck won't shut off due to the solenoid trim and I refuse to join the "pull cable club". It just drops about 400 rpm when key is off. I stretched the spring but, it only worked 2 times. I'm thinking of putting a very small washer down the spring hole to make up for the longer reach. Another option might be buy a new one, don't trim it but merely shave the brass down to the o-ring or remove o-ring altogether and screw back in. The removed brass material may be enough to pull the plunger in far enough out of harms way.
Kurt
On edit; I used to be able to pull the fuel pressure from 17 psi down to 3 psi; now it has no trouble getting down to zero