did that once,a brother of a friend found a genuine option 2 close ratio overdrive gearbox,that was going to be mine,mine,mine,but when it got here,it had changed into a normal 5 speed.now,my friends brother won't do any looking for us,& no-one can tell me where that 5 speed went to.probably someone noticed what it was when it was being cleaned for shipment & it was quickly swapped.so i didn't get that one.it's still an option though.