Early '80's Crane split duration cam. Not that big. 243 would be advertised duration, .050 is going to be under 200.
35 years ago I had a Crane HMV 278 in a '70 GTO rescue. 400 auto/3.23, nothing special performance wise, needed more gear/ balanced w resized rods w new rod bolts. As i sold that GTO, it ran well for a putt- a-round driver project, but thankfully the fellow I sold that '70 to spent some $$$ on an engine build.
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Buzzards gotta eat... same as worms.
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