CATERPILLAR ENGINE
This is the same engine that is in a Ertl No. 12 Grader. It is a reproduction.  Use it as a replacement or for a custom project that could use a 6 cyl. caterpillar engine. These are made from a 2 part rigid urethane. Available in painted or cast in paint version(less glossy)  
PARTS LIST
total length = 3 7/16"
front pulley to rear pulley = 2 11/16"
widest width of engine = 1 1/4"
width of oil pan = 15/16"
total height = 1 15/16"