I am in the process of gathering parts to rebuild my 742 case. I have 4:10 gears and the install kit. What should I get for the carrier? Locker, suregrip, suretrac, etc... It's a summer car that will be at the dragway 6-12 times a summer with slicks. I currently run 12.4 @ 110 in the 1/4 with my 3:55 gears.