Engine alignment? Ha! I laugh at the motor mounts!
(fortunately, all of mine still moved, mostly, so engine alignment was not a big issue..just a 3 foot iron pipe, a 25mm wrench and a small sledge hammer took care of that problem!)
Ok, not really it was a GPITA....but, um...what else??? Regular oil level checks for us MECHANICAL fuel pump guys, to make sure the oil level isn't inexplicably RISING, which might indicate a breech in the fuel pump diaphragm & fuel leaking in the crankcase. (I now have a fuel pump repair kit aboard!)
Also, don't forget to tweak the grease cup a few degrees on the non-Moyer water pump every few hours!!!