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That may be a modern day replacement cam for the LT1 but the original had way more duration than that. It wa a long duration low lift solid cam. Not really a good cam for modern day engines. It needs a high compression piston and rpm to really work well.
Lookimg arond the duration at .050 is more like 242/252. Those are the numbers that are more like it.
Duration at .050" is 242/254, lift .459"/ .485". To give you an idea of how it compares to a hydraulic cam, doing the math the durations are 231/239. Decent cam for 10.5:1 compression when using the stock exhaust manifolds. If you run headers you can increase your cam selection.
The cam specs. posted earlier are listed for 3972178.
another source gmpartsdirect
3972178 Mechanical Flat Tappet 70-71
(ID#3972182) duration at .050" tappet lift (intake/exhaust) is 242/254; and maximum lift with 1.5:1 rocker ratio (intake/exhaust) is 435/455. Valve lash is 024/030 and lobe centerline is 116 degrees.
(& in their chart as