1515 Old US Hwy 31 N. 1998 Detroit Series 60 12.7 Liter DDEC 4 Diesel Engine. Stock # AD 2539. (Only Applies To Good Running Engines, Excludes Cores/Take Outs). We remove Valve Covers and Oil Pans to inspect the Internal parts to ensure quality. World Wide Diesel Pays for your core to come back. Easy […]