Ally Financial – which operates mostly as an auto lender now – plans to reenter the residential mortgage space, a move that comes more than three years after the depository threw its Residential Capital subsidiary into Chapter 11 bankruptcy protection and liquidated its once-massive servicing portfolio. Then again, a quick look at Ally’s balance sheet reveals that it still holds a tidy sum of home mortgages, $7.85 billion in residential first liens and $344 million in junior liens ...