Wally's car is a 1936 Ford five window coupe.
This is the last of three episodes in which the actor Ralph Sanford appears; he plays a different character in two first season episodes. Ironically, he passed away on June 20, 1963, the day Family Scrapbook (1963) aired, the final episode of the series.
Although the family car shows a California license plate in Beaver's Doll Buggy (1961), the mystery as to where exactly the Cleavers live in the USA continues when Ward states the hypothetical that Wally could drive a car all the way to California, implying that California is not the state in which they reside.
Wally calls Lumpy Rutherford at 994324
Ward and June return from their dinner date at "almost midnight." Even with some shadowing, the outdoor scene is still fairly well lit; this scene is an example of 'day for night' filming.