need some advice

Did my 63 Valiant, 1 bulb. Yes you have to remove the park handle ( 1 allen screw ) remove the face plate. Not sure on a dart but on mine the bulb was hard to get to. used a piece of rubber hose that fit the bulb snug to remove and replace. Clean buttons (cotton swabs) soap and water mixture. Clean and lube your shift mechanism while you are at it. Lots of crud after almost 50 years.