1975 Other Dodge Models how to remove the rotor

you didn't disquinsh about brake or distributor. To remove teh distributor rotor it may be just pressed on and there may be a roll pin that you can see. If not iyou'll have to pull the distributor and take tit apart. as it may be part of the shaft. IF it's the wheel rotor, then you have to remove the brake caliper and bracket then remove the castle nut from teh spindle an dpull the bearings out.