Originally Posted by Stew Noble

It's the opposite I'm afraid

If you increase the spacers under the pivot blocks this also changes the relative angle and 'parallel-ness' of the upper link to the wishbone when the car is at neutral roll.

An increase of the pivot block spacers will raise the roll centre at that end of the car, the higher the roll centre is placed the less that end of the car will initially roll when entering the turn.

The more a car rolls the more grip it is generating on entry and exit, up until the point at which it traction rolls or just feels like it's reacting to input very slowly, a lower roll centre will aid the car by keeping it flat during cornering making it more nimble but the only increase of grip will be mid-corner.