There's no way Big Long Driller isn't a nod to the Big Daddies. Huge, masked drill bearers? Check. Hell, the Big Long Driller helmet even has multiple "eyes".
Both Big Bull Crocker and Big Long Driller do Leatherface's distinctive "rage dance". Plus, Big Bull Crocker has two chainsaws chained together, much like Super Salvador and The Empress.
They might also be based on Piggsy from Manhunt, since they're giant power tool wielding lunatics with animal masks.
The Maintenance Facility in Area 66, home to The Masters (Obi-Wan and Qui-Gon parodies that carry sabers that aren't heavy...), is full of shout outs to various sci-fi franchises.