were spark plug wires the same for all slants

The wires changed in '75 when the drool tubes (spark plug tubes) went away. Prior to '75 the wires had a boot with a cap to cover the ends of the spark plug tubes. From '75 on (peanut head) the wires had a straight plug boot. The late wires will work fine if you can't find the capped ones. In fact the parts suppliers are doing away with the older style wires. The 2 pics following were pulled from the same listing on Rock Auto ('73 Dart) and the Belden 700113 wires were the only ones with the caps. Hope this helps...

drool tube View attachment drool tube wires.jpg peanutView attachment peanut wires.jpg