71 Duster 360 (new project)
I have a field book in each car that I record changes.....oil changes....valve lash adjustments....transmission overhauls..jets...etc...
I usually write on the trans with marking pen...date of rebuild and if it has a 2.74 1st gear.
I also have a field book that i keep records for oil changes and other things for the numerous girlfriends i have too...