Setting Timing on OM617.951 after IP Reinstall

[snowbrd84]

I just got a 617.951 out of an'85 w126 300SD to put into my Jeep. I decided to go through and take everything off and change all seals and gaskets. I was not aware that the IP effected timing, I am new to diesel engines. The IP was the absolute last thing removed and the first thing put back on. To my recollection, the crank should not have moved between taking off the IP and reinstalling it.

It is likely thought that when I put it back on that it is off a tooth or two though... Unfortunately I did not see the threads on timing until after I got the motor in the Jeep and bolted to the tranny. Once I get the torque converter bolted on to the flywheel and the starter installed, then I can try and start it. What can I expect if the timing is off? Am I going to need to pull the IP?