I am 6'1" and 63 years old, so I think you'll do fine being comfortable inside and getting out.
This is a very, very fun car to drive-- clearly the most fun car I've ever had. German cars tend to feel solid but have a "serious" feeling about them, as opposed to being fun. The 86 is 10 times more fun to drive than my E36 M3.
I test drove Porsches before buying the 86 and don't recall smiling once.
It is my daily driver but also provides giggles in tearing up onramps on the weekend. Really a great car.
I think the 86 is the spiritual successor of the Alfa Romeos of the 60's and 70's, which were some of the sportiest and most passionate cars of their time. But the 86 would blow their doors off on any race track.
__________________
1995 BMW M3, 1973 DeTomaso Pantera, 1972 Dino 246GT, 1964 Fiat-Abarth 1000TC vintage racer