Swap Block Mock Up Cummins 3.9 4BT Engine Block | GF-EJ-CUMMINS-4BT accel Year Make Model Submodel 1989-1992

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Swap Block Mock Up Cummins 3.9 4BT Engine Block | GF-EJ-CUMMINS-4BT accel Year Make Model Submodel 1989-1992Engine: Cummins 3. 9 4BT Years: 1989 1998 Our patent pending tab and slot version of the mock up block provides accurate mounting positions of engine accessories and bolt ons. Weighs only 26 lbs This unique design is lightweight and comes disassembled for ease of shipping and storage. Precision formed returns on all weight bearing components and tight tolerance slots create a rigid and accurate representation of the Cummins 4BT 3. 9L engine block