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From tip to tail, every aspect of this classic ’64 GMC pickup has had a custom overhaul. While the custom paintjob and interior are impressive in their own way, nothing comes close to that limited production V-12 under the hood. Following a proprietary GMC design, this engine has a mighty 702 ci capacity. Although it’s technically called a 702 Twin 6, it’s still one single unit with a solitary block, crank, camshaft, and distributor.