1973 duster fit 20"s??

well i just got my first DONK in yesterday. a 73 impala. it had 24" rims on it. it also had louis viton interior! it pings because it took about 1/3 throttle just to get it to start moving. i told him that any work i do on it will come with NO warranty. the front had a custom large spindle and the rear had a bracket welded to the rear axle to support the rear spring.