This is a seldom-seen, one year-only engine, the Ilmor 265B, and it's in pencil so we can see all the fascinating work in progress. Look at the drawing section below. Leonardo-like, no?
LINK:
Tony Matthews on the Chevy Ilmor 265B Indy engine | Mac's Motor City Garage.com
![Posted Image](https://imageshack.us/a/img202/4853/ilmor265bv8weblead.jpg)