The GTs lost their Cobra tag for 1969 and once again were marketed simply as Shelby GT 350 and Shelby GT 500. The GT 350 and GT 500 for the 1969 model year received an extensive face lift, the body alone increasing in length by 4 inches (100 mm). Ford was involved with design and style decisions, with Shelby having little input. The GT 350 was now equipped with a 351 cubic-inch V8. Carroll Shelby terminated his agreement with Ford in the summer of 1969.
No production of 1970 Shelby GT 350 and 500 models was undertaken; however, unsold 1969 models were given 1970 vehicle identification numbers under FBI supervision. The 1970 models had two cosmetic changes, a front chin spoiler and two black hood stripes. The rest of the changes had to do with emissions .GT500 had the carburetor modified and marked "ed" (edited) on tag. The GT500 distributor was also changed to the 70 version. The GT350 had the distributor changed to a 70 version.
Source: Wikipedia (original)