Al's "Dodge Dart" is actually a Plymouth Duster. Both vehicles were Chrysler products so they looked similar.
Bud says there are only 800 dollars in the shoe box but he never counts the money in the shoe box.
Studio lights reflected in Al's sunglasses when he finally drives his new Dodge into the garage near the end of the episode.
The $5,000 Al was saving for a new car could've been safer from Peggy stealing it if he just put it in the bank instead of burying it in a shoe box.