Here's a video of my daddies pulling truck at Francis Creek Wi this year ... he run Street Stock, has 460 Cast in Cast out with a C6 and Chain drive Transfercase. Running 4.11 Gears in Low range 1st gear on 33" MT BFG's.This is a 300 Ft. Clay Track and he's pulling a 30,000 pound sled.
http://www.zippyvideos.com/2506997221918156/dad_in_francis_creek/
Oh YA did I mention my dad is 72 years old ...been pulling for 2 years now.
Shazam