The six power assembly doors (located near the center of the long hood) indicated that the B23-7 was powered by a 12-cylinder GE FDL engine

it boasts a fully detailed interior

The Trainz SKU for this item is P11442290

This long steel caboose features: Front / Rear Operating AAR Knuckle Couplers - Detailed freight car trucks with individual springs and metal wheels - Operating doors - Potbelly stove with smoking chimney - Solid state electrical circuit - Removable roof - Plastic trucks

and 6088 decoders

MTH 30-6172 Pennsylvania Aerotrain Coach Car #303 ProductID_11993829 The six power assembly doorsHere is an MTH 30 6172 Pennsylvania Aerotrain Coach Car #303. Features Include: Durable ABS Intricately Detailed Body Overhead Interior Lighting Metal Wheels and Axles Diecast 4 Wheel Trucks Colorful, Attractive Paint Schemes End of Car Diaphragms Fast Angle Wheel Sets Needle Point Axles Detailed Car Interiors Unit Measures: 10 7 8 x 2 3 8 x 2 1 2 Operates On O 31 Curves Condition: Factory New (C 9) Operational Status: Functional Original Box: Yes (P