I have the 3.64 plus OD box in my car and it is a great setup. Not too noisy at 80 mph, and not too tall to make a slow car even slower. Remember, these were not very fast cars when new, and need all the help they can get to keep up with lesser sports cars. If you put a 3.07 behind an OD box, you will reduce you revs at cruise by nearly 40%. Given that our motors make their best power between 3000-5500rpm, you are putting yourself outside that range and will not have any responsiveness in 5th below 90mph. That why I said you need a torque monster motor with this combo. Good setup for a turbo motor.
Like you I also have a freshly rebuilt dogleg CR box & 3.07 LSD on the shelf. Having driven a number of e24's with this setup, it feels similar to the 3.64+OD combo for cruising in 5th. And that should come as no surprise because the effective overall ratio is the ABOUT THE SAME w both setups.
The only advantage is the shift pattern (which you said is NG), and the CR (which benefits only if you like rowing the gears, but you don't like the pattern ...).
Sorry but you aren't making any sense to me. I don't understand why you are still thinking about the dogleg box when you just said you don't like it.
