I've done a couple, it's okay if you want to do it on car. More than likely you'll need to soap and water to get the grime off. Brake cleaner or acetone is fine. mainly to get the water off.
Totally get it weve all been there. For certainty measure it like I described. Then it’s real easy to visually see/check/confirm that bell housing difference.
Right or wrong of what? As long as you aren't a danger to others on the road then enjoy your car and do as you wish with it. It's nothing for anyone else to judge. I stopped fussing about how perfect my classics should be and enjoy them more than ever.