71 Duster 360 (new project)

Duster waiting for me to get off my lazy butt and dump about 10 qts of atf into trans and add water.....Weather has been cooler for us....I should get off work early tomorrow....and get it running along with testing the trans out........
Do you do anything to tag the transmission and water to make sure you don't forget because of the multiple vehicles or are you just relying on memory? if I had that many cars and did the latter of the two I would definitely be in trouble...