The Motor City truck wars are hotter than ever with Ford, Ram and GM each recently revamping their pickup lineup. The most recent contender: GM's redesigned Chevrolet Silverado and GMC Sierra.

They're common in '88-up trucks ... rod pin is offset in the middle by 30 degrees. There are also common-pin V-6 cranks (they look just like conventional V-8 cranks) developed for the Chevy ...