Here’s an excellent article John Canemaker wrote back in 1980. It talks about Dave Hilberman’s involvment in the Disney Strike. Hilberman, of course, was one of the initial founders of UPA with Zach Schwartz. When John Hubley & Phil Eastman came to them with the completed storyboard and the contract for Hell Bent for Election, their studio took off. Eventually, they sold out to Steve Bosustow and opened their own commercial studio in NYC, Tempo.
Thanks to John Canemaker for permission to post this.