Converter measurements

Ya I noticed that too. I guess that’s typical for some of these articles. Lol. I run powerglides in everything now and what I do is turn my pump tangs so they are at 12:00 and 6:00. Then I mark my converter with a white paint stick so I know where to line it up. When it’s seated in the converter I can rotate it back and forth and hear it clicking on the pump tags. Then I tie it back in place with a string so it can’t slide out during install.
Just curious. Why powerglide vs a 904 or 727?