3406B fuel setting issue

Kind of a long story...but hang with me.

I'm not full time at shop yet so boss had to call someone in for fuel in oil issue with a 91 W9. Has 3406B that was pretty hot. She would run off from and get better mpg than any truck in the fleet. We had just put new orings in the plungers so mech figured we messed something up in the pump. My first thought was transfer pump...but I was at a livestock show so I wasn't around. We had another B model as a spare on the yard so he pulls the pump off of it...changes the transfer pump...and puts new orings in the fuel lines going into the spacer plate. He also found that the timing advance was worn out. Replaces all of this. Truck runs the next week, gets about 40 miles from home and has diesel in the oil again...alot. I'm back at this point, so I pull the valve covers, about to change the nozzles and find they left the #6 fuel line loose from nozzle....so I torque it down and check the others. Saved the money from all the nozzles...good thing. Anyways...solved that problem.

Now to the problems at hand. The pump he took off the truck was from a 350hp 3406b. The engine he put it on was a 475 that had been turned up. He didn't change the rack settings so of course the driver said it won't pull....and of course not at 80,000. So I was told to get it back up where it was. Went by the advice of ynot on dieselgarage and went as it was supposed to. Until I felt the screws. I fuel screw was turned three screws in further than the torque screw. I checked a couple other b models and both were even. I tried to search for anyone else that has seen this and everything you see is turn them out the same. I figured since all the others were even and they should be turned the same I screwed the fuel screw out evenly with the torque screw. Seemed to run good. Not alot of smoke...although afrc is screwed in now. Driver seemed happy. Pulled 23psi bobtail. All is good.

Well driver calls and it won't pull up in MO. Won't pull over 15psi. I think maybe diaphram or timing. So I deside to check timing and find it retarded. Pretty bad. Advance had slipped. Pin timed it and it seems good. Would pull 23psi again...called him wallago and its running good. But still not quite right. But at least that problem was easy. Guess he didn't get advance torqued down right.

I'm assuming the pump will work on this engine. The power doesn't come until you press the pedal down about half way. It goes....but then you really feel it when you push the pedal down half to a little over half way. Could this be due to the torque screw setting?? I would like the power to be smoother coming in. I'm guessing that could be the torque rise setting.

My question is, what is the best way to reset the two screws...then how many turns to get it to 475. Can you not bottom the screws outs then back them out a certain number of turns to get 475? IE...bottom the two screws out then turn them 5 rounds will get you what?? Does that make since? The pump is a 7WS and the engine...if I remember right is a 7FB. Will those plungers work with this engine? I'd like to get it back to stock...then add him a couple of turns. Just trying to find a starting spot. I hate chasing stuff that I didn't do. So far thats what I've been doing. The tag is gone off the head so I can't get the rack numbers for the engine or I would use a dial indicator for rack travel.

Any ideas?? Thanks guys!!