Sorry, it's not a myth. At a local road course, I was 3 seconds faster with the 5-speed in my car vs the auto...no other changes, and only 2 weeks apart. That's a HUGE difference on the track...
1/4 mile I was a full second faster...
You can do OK with an auto, but not be competitive.
That being said, the machine work on your crank plus new bearings will coast as much as a used KA24E...check here for your options:
http://www.car-part.com
- Brian