Dee ihe na-aga n'ihu maka paragraf a - Shelby American na Ford rụkọrọ ọrụ iji rụgharịa GT40 maka oge '66, na-edochi engine nke 289 cubic inch (4.7 L) na Ford buru ibu, dị ike 427 cu. in. (7.0 L) engine. Mk II GT40 nwetara nnukwu ihe ịga nke ọma, na Shelby American meriri na Daytona, Sebring na Le Mans na-enweta Ford International Manufacturer's Championship na 1966. Ụgbọala Shelby American kwụsịrị nke mbụ (Miles & Ruby ọzọ) na nke abụọ (Gurney & Jerry Grant) na Daytona, nke mbụ na Sebring (Miles & Ruby), na nke mbụ (McLaren & Chris Amon) na nke abụọ (Miles & Denny Hulme) na Le Mans
Ọ dị mma. Gurney na Grant gaara agbacha nke abụọ na Sebring belụsọ na ụgbọala ha mebiri n'agba nke ikpeazụ ma Gurney kpaliri ya gafee akara ngwụcha, na-achụpụ ha na-akpaghị aka.