Union Pacific 3900 Series 4-6-6-4 Challenger drawings, engine only- Boxes – Driving – Driving Box Housing, Front & Intermediate (3,4)
		SKU/Drawing Number: #164-CA-27101 C
			| Wheel Arrangement: | 4-6-6-4 | 
| Scale to 1 ft.: | 3” | 
| Drawing Title: | Boxes – Driving – Driving Box Housing, Front & Intermediate (3,4) | 
| DWG. Size (in): | 30x50 |