We have a another engine at the shop that is going into a car soon and it has this ignition with a female cap. That will be the third one. We just ordered it. I will try to compare its dimensions to mine.
I will also try to get a sense if the tall cap is narrower.
You can see in my photo that it is not jammed against the firewall. I am wondering if your engine is sitting up and forward. I will be at the shop tomorrow and ask Steve about it.
I think you can send an email to Progression Ignition and ask if housing changed.