Adjusting the geometry of the rear suspension is a nice tweak. In the stock setup the rear spring eye is quite a bit higher than the front spring eye. This makes the axle move forward and rearward as it moves vertically. What this does is set the car up with some roll understeer in the stock configuration.

What happens is the rear axle steers the car a small amount as the body leans in the corner.

One of the nice tweaks I have done on several 1200's (and my brothers Ford Pinto, many years ago) goes like this. Add a 1" lowering block (or have the springs de-arched 1"). Increase the rear shackle length a hair over 2". This causes the spring to be much more parallel with the ground and does not change the ride height.

With the rear springs more parallel to the ground, the rear axle has less roll steer. It makes the car more stable on bumpy roads. Really shows up on long sweeping corners that have lots of bumps. Most of the tiny steering corrections you normally make just go away.