Squared rollcage debuted in 92. Same year the Sahara debuted. Pretty sure abs became an option that year too.Wait... the JK? The rollbar was extended on the YJ. Don’t remember the years exactly but the original YJ (87-?) had the angled roll cage that led to tragedies like your friend’s (sorry, by the way, that’s really sad). I want to say it was 1991 when they squared it off to better protect rear passengers.
Having said that, great work OP. That looks awesome.