Ashley, conversion therapy in the 1960s was just nasty stuff, I'm afraid. I had some experience with this.
I was 'caught' at age 15 and taken around to see some doctors, ones with dimly lit offices and no exam tables who just wanted to talk for an hour. My parents were offered some interesting options.
I could receive the standard state of the art treatment, electro-convulsive therapy followed by faradic or chemical aversion therapy. I gather the ECT was to soften me up and make me more receptive to the aversion therapy, which would consist of my watching a slide show while hooked to electrodes or an IV. Shocks or a nausea-inducing drug would be given while slides of things I wasn't supposed to like were shown. Patients who didn't respond well to this could be given a prefrontal lobotomy to improve compliance.
My folks, Mom primarily I think, opted not to go this route. (Mom was an RN and had a pretty good idea of the details involved.) Instead, I got the hormones and counseling treatment.
I had undescended testicles, no body hair or beard, and was a slight, effeminate 15 year old. This was probably due to DES exposure that I confirmed several years ago. I had done very well academically, but was poorly socialized, what with the beatings and other things that happened to me in school. Let's just say that the high school locker room was the place I most feared once in an all-male private high school.
I was given a series of injections, very likely testosterone, and received counseling. The counselor was an authority figure, definitely not trained as a gender counselor, who explained in detail the error of my ways and gave me quite the self-image and self-esteem talk. I was a horrible person, and was to suppress my evil ways at any cost. I was eventually 'cured', becoming a D student prone to violent outbursts and waking with screaming nightmares. Yay me.
So, that's what the mild version of conversion therapy did for me.
The effects stuck for almost a decade, gradually breaking down when I was in my late 20s. I met my first transwoman that I was aware of when I was 32, and realized that was likely what I really was, but suppressed this as best I could for another 30 years.
I think conversion therapy made me what I am today, a late bloomer with issues. I'm recovering. I still have nightmares.