During his first full-blown news conference, Gov. Dannel P. Malloy, in response to a not-so hypothetical question about eventually crunching heads with House Speaker Chris Donovan and Senate President Don Williams, speculated on who might not get knocked out. “I’d probably win that,” he told reporters in his Capitol office, adding that his head is a relatively large 7 and 3/4. Malloy said he will spend tonight in the Governor’s Residence and eventually sell him house in the Shippan section of Stamford.