1966 Lotus Cortina

I changed the driveshaft from the original 2-section one to a single one because I thought that a vibration I began noticing was due to the driveshaft. It turned out to be the flywheel, which lost some added weights, so I obtained a NOS flywheel from the UK, installed it, and the vibration problem was solved. I didn't change the driveshaft back to the original one, but I still have it, along with all the connections, and it goes with the car.