65 Barracuda 904 Trans issue

I had this same frustrating trouble. Here is how its done:

Have someone hold the shift lever firmly in low. Loosen the adjusting wheel, pull the shift cable out with about 2 lbs pressure, turn the wheel clockwise until it just contacts the case, turn the wheel counter-clockwise just enough to make the adjustment hole line up with the bolt hole. This hole is number one, continue turning wheel counter-clockwise until the fifth hole lines up with the bolt hole. Push the cable in until the wheel is flush with the case and install the bolt. Fill the tranny with oil. This should work the first time but I had to do it again to get exactly correct.

Good luck