What is a "WEDGE" motor......

A wedge is an engine with its valves side by side in a straight line with the valve stems tilted at an angle to the center of the bore. This results in a combustion chamber whose profile is wedge shaped as opposed to a hemi whose profile looks like half a ball. Know that's about as clear as mud but it's the best I can 'splain it in 100 words or less. Hope it helps.