General Motors’ IPO far exceeded even the most optimistic expectations, raising a record $23 billion. Could long-troubled Chrysler ride on its crosstown rival’s coattails? Widely perceived to be the weakest and most troubled of the domestic Big Three makers, Chrysler has its own debt to repay to the U.S. taxpayers who helped bail the company out after last year’s bankruptcy filing. But unlike GM, the smaller automaker still has plenty of obstacles to overcome before it can hope to win Wall Street’s support.