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Originally Posted by Hypsi87
also I'm gonna figue that you are going to ask me about the Turbo Trans Am. In 1989 for the 20th anniv. pontiac borrowed the buick turbo v-6 and put it ina GTA body. same drive train as a GN but in a TA.
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Actually, the TTA had the heads from the 3800 Buick engine (different from the 3.8 in the Turbo Buicks.) The engine bay was too thin for the 3.8 heads. The new heads bumped the compression a bit. Also, the TTA had a cross-drilled crank from the factory.