Kinda depends on the suspension geometry. If the suspension tends to go negative when the spring is compressed, a static positive setting MIGHT be appropriate.
But I don't know if that's the case for an Olds Cutlass.
I entirely do not understand how the "Service Checking" camber spec is -1.5 + or - .5 (Range -1 to -2) while the Service Setting is +.75. Doesn't make sense to me. ESPECIALLY since the Caster and Toe "Checking" spec and "Service" spec are essentially the same thing.
I suspect an error in the service manual spec for camber "service" spec. Should be -1.5.