does this help? (different time as well as key signatures here)... you can score 6/8 tune in 3/4 but you'd need twice as many measures to effectively convey the compound pulse feel of the Wreck... the tempo is noted as Slowly/Moderately Slow", 68 beats per minute
there must be a trained musician member who can elaborate/articulate this further
btw, found a clip of that 9/8 section I was referring to...fun
YouTube - 9/8 Solo (Genesis)