It's not how tall you are, it's how long your legs are. I can tell you a fairly-boring story about how some BMW promotional people ignored me pointing this out and caused a ridiculous situation in their ridiculous competition.
I am 5'8". I have Caterham black-leather bucket seats in my car. I drive with the seat well-forward on its tracks. I do sit a bit tall in the saddle. OK, I have shorter legs than people expect.
I knew a guy named Duane Johnson (actually I knew several guys named Duane Johnson, including a guy who changed his name to Duane Warren because there were just too-damned-many Duane Johnsons about) who was way shorter than I but had longer legs. Duane built us a single-seater out of my old SAAB parts. When he put the seat in to suit him, I could not reach the pedals and the roll bar was too short. We solved that by making the seat re-positionable so I was in the "Lotus position" and he sat upright.
I suggest you get the bucket seats with seat tracks unless perhaps you always drove your Elise with the seat all the way back.
BTW, I just turned 75.