It's in the New Yorker magazine, and is quite detailed. The web page interface is somewhat awkward, but worth trying to read: http://www.scribd.com/doc/123580907/THE-ART-OF-SPEED-Bringing-Formula-One-to-America-The-New-Yorker-BY-BEN-MCGRATH-FEBRUARY-4-20... It's interesting that he still uses a drafting table.