Lou, I have three males together in a cage that is 20 inches by 4 feet. It is plenty of room for them, they can still rip and race and not bump into each other. You should try, nothing to lose.
I have three males living together without any problem. I never noticed pairs forming, with males or females. Humphrey is socially retarded, so he´s very offensive to adult pigs, but I´m pretty sure he´d be ok with the babies.