you can use the braided universal style dipsticks from TH400's TH350's 700r4's maybe more. It will not be accurate so get it right off the OEM 4t65e dipstick. The braided ones are $20-$60 online. You can see the aluminum top of mine to the left rear of the engine bay
I'm sure if you wanted to you could cut the tube and stick. Just be aware of how high it should read. As long as the tube is seated tightly in the hole you shouldn't need that bolt.
[This message has been edited by djlamp14 (edited 09-02-2014).]