It backfired as hit man humor and now Herald columnist Howie Carr wants Tom Finneran behind bars for a tongue-in-cheek threat to have him whacked and stuffed in the trunk of Gov. Deval Patrick’s Cadillac. “Real men don’t talk about putting people in trunks, they just do it,” Carr sniffed yesterday of the former Democratic House speaker, who traded up a felony conviction for a plum gig hosting WRKO-AM’s morning talk show. Last week, Finneran told Patrick on the air that the two of them should take “Howie Carr for a ride,” and “only two will come back.” Calling the...