[nkb]

The Shelby continuation rollers are delivered without a driveshaft. The driveshafts are supplied and installed by the owner/installer. So, there will be no "standard" driveshaft spec. The driveshaft is also dependent on the transmission length dimension, also not delivered with the roller.

You will need to measure the current length and the Spicer joint model numbers and order a custom driveshaft. The required measurements needed for the fabrication are as specified by the vendors such as Denny's or Inland Empire Driveline. They can tell you what to measure and then create the correct fitting driveshaft.