B1750 injection pump rebuild

[Jackblackmamba]

I’m rebuilding the injection pump with an eBay kit and noticing my injection pump is a little different than anything I’m seeing online for the 1995 Kubota 3cyl diesel b1750 tractor motor. Putting it back together I see that the plunger is keyed to a rack and pinion style slide. I’m unsure as to which way the toothed key cylinder fits into the rack. Does anyone have info on this or a manual specific to this type of injection pump? Looks like the parts in the kit (springs and washers) are the same as original.
Diesel Kiki 8450028
Np-pfr3kd50/2npg
Asst no 104293-3011
Bosch
15531-51012

 

[Jackblackmamba]

Based on the 3rd slot that I opened carefully, the pin and toothed piece fit just barely off the x axis (when looking in) when the fuel slide is all the way to the left. The plunger pin that fits into the toothed piece has the notch on the right in this position, see pictures for details.

 

[Jackblackmamba]

I also found out that the upper plunger pin is slotted to the screws in the back plate. Does anyone have a part # or spare pin screw available? I broke through the metal in the bottom of the injection pump pin housing, going to attempt to not fix that and only use a new pin screw because 1000+$ seems like a lot to spend on a 30 year old tractor I got for 2500$
See attached picture