This is in the 2010 Rulebook !
Monday, January 18, 2010
Attention all Top Sportsman competitors. As a reminder from the Technical Services Department on page 4.14 of the 2010 NHRA Rulebook, DRIVELINE: 2, DRIVELINE, “Each end of driveshaft must have round 360-degree driveshaft loops within 6 inches of U-joints.” Be sure to check that BOTH ends of the driveshaft have a 360-degree loop within 6-inches of the front and rear U-joints. If you have any questions regarding this rule please contact the Tech Department at 626-250-2485 or
TechDL@nhra.com.
Keyword here is BOTH ends of the driveshaft.
Looks like Bickel has a nice set-up for the 9 inch Ford pinion support rear ends.
http://www.jerrybickel.com/driveshaf...enclosure.html
It is only $ 395.00 --
Funny thing is , this is for T/S Only , not comp, SS or any other sportsman class.