Will this prop fit my Cobra Drive

[a70eliminator]

Hi, looking at an e-bay prop, it's an OMC Johnson Evinrude stiletto sst 14-1/4 18P 15 spline prop. My Cobra is a 15 spline 5.8 V8. Could this prop fit both outboard and I/O drives? the guy has it listed as fitting 4 and 6 cyl's but it is a 15 spine shaft so why not a V8? Please help I'm not to up on props.