The Ranger CV, as written, comes with a capacity for 1.2 SCU. Does this mean it can carry more than a Cyclone and, when 1 SCU is 8 mission boxes as it currently stands in-game, will it carry more than 8 mission boxes or only 3 and 0.375 SCU?

The stated 1.2 SCU is incorrect and the result of changes during production that chose to favor increased powerplant size over cargo capacity. The final concept is indeed capable of only carrying 0.375 SCU (3x 0.125 mission boxes). The text on the brochure and website will be updated accordingly.