injection pump timing

[1850Dpuller]

I have put a 2-105 white injection pump head on a 1850 body the tractor runs rough could this be timing? Are 1850 and 2-105 timed different or could this be something else? Thanks
 

[J. Schwiebert]

How did you check your timing? Some 2-105 tractors are timined after different degrees than 1850 tractors. does your 1850 still use the short splined pump drive shaft? Did you turn the fuel up on the 2-105 head?
 

[1850Dpuller]

I still have the splined shaft drive. I didnt think u can get it out of time because it looks like it only goes one way. I used the 2-105 roller ring im thinking I should have used the 1850 roller ring. I have maxed the fuel delivery but im not getting max I think (less black smoke than my old pump). thanks