I used a sealed bearing in that position when I went through the transmission for my '40. Pulled the seal off of the front side of the bearing to ensure that it was lubricated by gear oil and left the seal on the backside. Has worked well for the last 6 years...
Avgas will not go bad nearly as quickly as Mogas will. We never worried about bad gas even if the aircraft engine hadn't been run for 3 years or more. But, having dealt with avgas that had been in an unused drop tank for over 20 years I do know it will go bad eventually.
If you don't need the...
Sorry to see this, but time marches on...
I have a set of your fenders on my '40 purchased 30 years ago, have always been very happy with the quality.
Have a great retirement!