It so close to a factory 340 4 speed cam it's not worth the $ to change it. JMO.
It is a good cam and will run fine with a good tune up. MY 70 340 4 speed Dart ran 102-103 with that cam, LD340 and 750 DP, 3.91 gears. It scoots pretty good. and better than the factory std 340 cam. IMO, run what you have.
Factory saying they were 10.5:1 and what they really were are a bit different.
