the rat in the names means big block the car is named rat roaster.This rides runs a mouse. the little mouse motor aka small block chevy will be roasting the big block gm cars that were built in the late 60's early 70's that is the time line the car was built after. it was a great build and he stuck to his list of ideas from the start you can watch all whole build on stacy david's web site
....And what did you use to drill/cut them out thanks much.