He sts silverado i got a 06 crew cab with full bolt ons, stall, gears and its in the shop for a cam swap and wanted to know if you have done and changes to your drivetrain like a custom two piece driveshaft. i know some guys running low 13s that broke the oem driveshaft with slicks i broke mine on the hiway racing a supercharged f-150 like at 140 mph. i am a bit scared of braking mine again with the cam and slicks.