Rat Motor
http://www.geocities.com/MotorCity/D...ssary.html#rat
Rat, Rat Motor: Big Block Chevrolet engines 366, 396, 402, 427, and 454. These engines were called this due to the staggered patterned of the valves, which stuck up at different angles like the quills of a porcupine.
Mouse, Mouse Motor: The nickname for the small block Chevrolet engine, named such because the big block was called a "Rat" and so the small engine must be a "mouse".
"Mouse motors" and "rat motors"? They're the affectionate terms the enthusiast publications use- small block engines are "mouse motors", large cubes are "rat motors".
It's a great GM ad.





Small Block= Mouse
Big Block= Rat.
The plate on my 68 427 reads "RAT.427". I am forever trying to explain to people what the plate means
The Best of Corvette for Corvette Enthusiasts
John
The BBC was therefore called a rat, i.e. a big mouse.
The Complete CHEVROLET Book by Petersen Publishing Co.
"And, believe it or not, 20 years of Ford dominance in the American youth market melted away almost overnight. The kids started buying
V-8 Chevys en masse as early as the spring of 1955."
"And the rest is history. Within weeks the new V-8 Chevys were moping up their stock classes on the drag strips- and running away from the Fords and Olds 88's at the stoplights."
Even much later I had an interesting reaction. After shutting down everyone in Galveston (they did not know me there
) w/ my cousin riding, she said she had to see the engine. She was accustomed to fast cars, drove fast, had a boyfriend w/ a modified GTO, etc. She was shocked at the small size of Mighty Mouse. Later ran a Mighty Rat in the other Hot Rod.















