Any current or former Austin Healey owners?

I've owned them and have vintage-raced a 100M, but I'm short. Legroom will be fine for you(I've had to add pedal extenders!), but height may be worth checking: With the top up it's very low. It really depends on the seating: If the seats are fresh with stiff insides, the seat bottom will be tall. But with a little work, the seat pads can be easily made shorter and still look correct, plus the seat could be bolted directly to the floor. Seat backs can also be adjusted. The trick to entering is to go in right-knee and head first, almost over across the center tunnel. When exiting, sort of exit ass-first. The door openings are very narrow which makes getting in/out challenging until you get the hang of it. The steering wheel may be a little closer to you than what you're used to, but it feels great after a while.
This car looks fairly solid, but only appears to have a few "M" things on it like the carb box. If you're going after an M, there are a lot of tell-tale signs around the car that you'll need to check.

 

i doubt you will fit comfortably.

we have a 100 BN2 and my son who is 6'3 and 210 does not fit.