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The 428 cu in (7.0 L) Cobra Jet engine continued unchanged in the 1969 and 1970 model years and continued to be advertised at . If an V or W axle was ordered (3.90 or 4.30 locking ratio) on any Cobra Jet Mustang, included were engine improvements to make it more reliable on the strip. Included was an engine oil cooler (making AC not available as an option), stronger crankshaft and conrods, improved engine balancing, and was named the 'Super Cobra Jet'. These improvements were later referred to as 'Drag Pack'.