If you have a distributor with a Hall effect sensor (LH 2.2 = B230F, up to and including 88, B230FT, up to and including 89) the sensor is mounted solidly to the distributor base plate. This plate can be rotated relative to the head to adjust the timing. If you have LH 2.4, the distributor contains nothing but the rotor, and the timing signal comes from a crankshaft sensor mounted at the top of the bellhousing, that reads holes on the perimeter of the flywheel. This sensor is fixed in place and is not adjustable. Turning the distributor on these cars does not adjust anything, it only makes the spark jump from a different point on the tip of the rotor to the electrodes on the inside of the cap. That's why the electrode on the tip of the rotor is about 1/2" long---so that it will work properly, wherever the distributor is "adjusted"