Al's uncle was named Stymie. Also Al & Kelly both mention Buckwheat & Spanky seconds later. Stymie, Buckwheat & Spanky are 3 of the Little Rascals.
According to "The England Show I" (#6.24), Al and Bud are the only surviving male Bundys. This means that some time between this episode and the end of Season 6, Iggy, Lester and Eugene Bundy were lured to Lower Uncton and killed.
Marcy was shocked and says "10?" after Peg says, "and of course there's that 10 months of pregnancy." Technically a pregnancy lasts 10 months (40 weeks). A woman's due date is the 40th week after last period. But the average woman gives birth before that (in the 9th month).