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Now Here's a Big Block: GM's 637 Cubic-Inch V8
Now Here’s a Big Block: GM’s 637 Cubic-Inch V8 | Mac's Motor City Garage
Flashback Friday: GMC’s Monster 702ci V12 “Twin-Six” engine
Flashback Friday: GMC’s Monster 702ci V12 “Twin-Six” engine
A Look Back at the 702ci GMC Twin-Six V12 Engine
Certainly one of the most unusual engines of its day, the GMC Twin-Six V12 appears to be a pair of 60-degree V6 engines welded together.
Now Here's a Big Block: GM's 637 Cubic-Inch V8