In your original post, you stated high blood pressure runs in your family, just never for you. Now might be the time it's hitting you.
Like you said, individual effects of hormones are just that, individual. But the body changes over time whether we want it to or not.
Your BP was consistent for many years but all of a sudden has jumped to be much higher - with the new guidelines released in November, those are actually Stage 1 and Stage 2 hypertension numbers.
I'd take that as a sign something with your body has changed and it's not tolerating things like it used to. I'd start getting tests done to figure out what that is.
And I'm genuinely curious - if you're cruising at 750mg testosterone, what is a typical blast / cycle / etc. for you?