if the original cam is still there it's probably toast upon inspection
the number 1 is not promising, have a look here, apparently some ID marks are between the lobes and this will giva an idea what some factory cam markings look like. unfortunately the 72 CJ is not listed though
http://mustangtek.com/Camshaft/camshaft.html
there are reproductions available but seriously think about modernizing the lobe tech
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