Apparently, there wasn't much to talk about when the '68 Shelbys debuted. With a 250hp, 302 four-barrel replacing the 306hp, solid-lifter 289 Cobra in the GT350, and a single-four 428 taking the place of the previous year's dual-quad big-block, the magazines of the day basically ignored the '68 Shelbys.
Regardless, the GT500 turned in respectable mid-14-second e.t.'s, while the GT350 posted high 14s, which were, surprisingly, quicker than the tests of the '67 GT350s. At mid-year, however, the GT500 became the GT500KR with the 428 Cobra Jet engine, which is listed below with all the CJ Mustangs.
'68 GT500 - 14.56/99.77 - auto - 3.50 - Super Stock, Aug. 1968
'68 GT500 - 14.75/98 - auto - 3.50 - Motor Trend, March 1968
'68 GT350 - 14.9/96 - 4-spd. - N/A - Hi-Performance Cars, Sept. 1968
'68 GT350 - 14.9/94 - 4-spd. - N/A - Road & Track, June 1968