Howdy,

The 742 power lock sure grip unit in my 68 GTS is starting to drive one tire more than the other. There seems to be two clutch pack sets available for the 742. One has thin shims and the other is said to more aggressive.

Can I get some insight on which to use? Car is 3650 with driver, 475hp with a face plated a833. Also installed a Big Shot NOS plate and Doug's cut outs. : D All of that is kept in check by a NOS mini progressive and a Clutch Tamer.

Trying to spin the tires at the hit until we can get the Dana 60 finished. Not difficult with 235/60/14 m and h muscle car bias plys. FWIW car has QA1 stocker star R's front and rear.

Thanks for any insight!