Ass-Kickin' Engine of the Day: GMC Twin-Six V12

After doing a little research on the GMC V6 in today's DOTS car (and recalling a reference to the Twin Six by commenter Paul_Y a while back), I find it necessary to pay homage to the mighty GMC Twin-Six engine. It wasn't two GMC V6s joined together- it had a unique block and crank, with four V6 cylinder heads bolted… » 10/29/07 2:00pm 10/29/07 2:00pm