Why not T-tops? You could then put a giant "screaming chicken" on the hood, grow a big mustache, buy some gold chains and call yourself Bandit!
Seriously...I saw a few of them done back in the day ('80s) when they were popular. They were the old type where it was just a peice of glass that could be removed. The modern types with power retracts would probably be very tough, since they are much thicker. You could always make a new headliner an lower the interior a few inches...but like I said that'd be tough.
If you do end up cutting your roof, send a PM to "68&00GT" he needs a roof repair panel for his Eleanor coupe.