6.1 - Nag1 transmission dipstick tube question

Hello all,
I’m in the process of swapping a 6.1-Nag1 combo into my 67 dart. I’m using the Holley engine and transmission mounts, along with the Holley headers.

The nag1 is a tight fit but clears after some shaving on the transmission and massaging of the tunnel.
I’m wondering what others have done for the dipstick/filler tube. Did you use the stock tube and notch the tunnel? Has anyone found a flexible dipstick/fillet tube?

Thanks,