Stimulatory stimulants and CNS stimulants are not the same. They can be both, but amphetamines or cocaine do not increase the respiration rate, it doesn't work through dopamine, norepinephrine or serotonin, repiratory stimulants tend to be chemoreceptors agonists, they work peripherically, not through the CNS. And that's what they used before narcan, and that's why barbiturates are so dangerous in overdose, you can try to treat the overdose, but you can't reverse it.
Also, nalorphine was introduced in 1954 and that's what they used for opioid overdoses. Naloxone is shorter lasting and is not a Kappa agonist like nalorphine so it replaced it, but nalorphine was perfectly effective. Nalodeine was discovered in 1915 but I don't think it saw clinical use.