[1930artdeco]

Here are my thoughts:
1) The zerks should all be the same. That being said a lot has happened in the last 100 years. I like screw in so that they don't pop off when trying to push grease into a cavity.

2) If you have oil up to the threads in the tranny you will be fine. As far as the 80/90 wt. it will work in the tranny as a top off. It may thin the 600wt. out a little but if you need to you can add some STP to thicken it back up. JUST A LITTLE as that stuff is really thick.

3) Good luck on the road trip and have fun. Are you going to the National in Oregon in June? IF so we are having a Ford Barn meetup for Pizza, there is a thread here about it.

Mike