I had a few minutes in the shop the other day....
I made a new PTO cover with a raised angled fill port for the transmission. I have had really good luck ( knock on wood ) with the Getrag 5-spd since I started overfilling it a little bit. Its always been a pain to overfill since there is really no port to do so. I had been pulling the top most bolt on the PTO cover and using a small hose and pump to inject the fluid. Generally this has always been a pain in the rear. The Getrag uses thin motor oil weight fluids so just pouring it in from a quart container is an option.
I traced the PTO cover from my SM420 that is going into my Willys as a pattern onto some scrap 3/8" aluminum. Then I cut it out on the band saw and rounded the corners with a belt sander.
I then drilled the 6 mounting holes and test fit it on the SM420 to make sure everything lined up correctly. I added a large fill port towards the top with a 45 degree fitting and plug. The idea is that I can use a funnel or pour quart sized containers right in the top. For a level, if you pull the left top side mounting bolt ( when looking at the cover on the truck) that seems to be just about the 4.5-5 quart level on my truck.
Just a simple improvement.....
I'll get it on the truck soon. I need to pick up another PTO cover gasket.