The engineering house Callaway is offering an innovative wagon version of the 2014 Corvette Stingray called the AeroWagon; it expects to begin delivery of the modified cars in early 2014. Known for its lineup of performance-enhanced vehicles ranging from Corvettes to full-size SUVs like the Cadillac Escalade, Callaway is making a departure with the AeroWagon’s modified body that includes a new wagon-like roofline, which boosts rear cargo capacity in the two-seat sports car. In addition, buyers can specify the …