[Bobcat]

You do realize that Jim Wangers' took a hard line that "NO" 421's where put into GTO's at the Factory. It wasn't until a couple of years ago that Jim Wangers admitted that the two '64 C & D cars had 421's. In 1962 there were 6 1962 Tempests with 421's taken to Daytona,one black and five white, one year before the official 421 SD Tempest program everone knows about. YES, in 1966, they built 6 421 Tempests that where also shipped to Smokey Yunick and onto Daytona for testing. These types of cars were/are known as engineering mules. They were built without titles. Even today mules are built without VIN numbers than, supposed to be, crushed. This is do to lawsuites and liablities.These are a few of the ones I know of. There are many more. NEVER SAY NEVER. These cars do not generate paper work for the historic services. GM can't afford to admit they built something that does not comply with the AMA papers they submit to the government . These cars are not for public consumption. Official line will aways be "Didn't happened" I'm sure you have heard of the Delorean's "What If Sessions". Delorean himself drove around a '67 Firebird convertible with OHC 6 with side draft webbers. Pontiac didn't offer it. Does it mean it wasn't built either because Pontiac Historic Services doesn't have the paper work. At least Jack "Doc" Watson finally admited that all of the '68 and '69 Hurst Olds' had factory installed 455's. For years people beleived that Hurst or Demmer Olds did the swaps. Chevy put 427's in Nova' and Camaro's. What, Pontiac didn't have the ability? THINK ABOUT IT Pontiac invented the concept.