XP-887 comes up Vega... see caption under first pic here:
https://en.wikipedia.org/wiki/Chevrolet_Vega
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The Vega was conceived in 1968 to utilize newly developed all-aluminum die-cast engine block technology – the first sand-cast aluminum blocks had preceded the decision to build the car by two years. A relatively large displacement engine with good low- speed torque was decided on, with gear ratios for low engine rpm to achieve economy. Engine testing totalled 6,000,000 miles. A pre-test engine was installed in a Fiat 124 sedan for development of the aluminum block, while several 1968 Opel sedans were used for drive train development[9]"