With any luck, you should slide about 5Kz down and 1Kz up. Remove TR24 2. Re-tune coils L37 and L38 for maximum forward swing on AM mode. Find D52, R44 and R174 and remove them. Solder a jumper from where you removed R174 3.
Some radios have different colored wires on the clarifier control.
If all goes well, you should slide about 4 down and 1 up. Remove D51 and put in a jumper. Add a 4.7uh to 10uh choke to the banded-end of the stock varactor. Install a 4.7K resistor across the cut you made. Note that this will not work on all channels.