At the risk of being banned on my first post, we use the 01X gearbox in a Lotus Esprit conversion we do where we fit the GM LS3 engine. We developed a new gearbox mounted starter motor which allowed us to use an 8mm thick adaptor plate, space is pretty tight in an Esprit. We use the GVD ratio set, which has a slightly longer 6th gear, but the GVC is the closest ratio set.
If you would like any more info please let me know.