6.0lL radix 112, 212-218 low lift, 2.8 pulley and long tubes. Would single 3" in duel 2.5" out be large enough? mostly towing with high 12 second potential. My problem is no one makes a 3/4 ton cat back to fit a sc sb 1/2 ton. If I buy headers for the 3/4 and no cats I wouldnt be able to get a custom exhaust so half ton headers and a cat back I can do my self. OBX style headers are about 200.00 cheaper for the 1/2 ton as well. Im on a budget.