yep - I know people that are 6'7" with Elises....he will probably need a quickshift (shorter lever, moved over to the left a touch) and a removable steering wheel, with spacer, so he can have seat all the way back.....
With regards to being broad, that was my concern when buying an elise. I do a lot of weight lifting but still fit ok, best bet for your mate is to go and try one out for size. If you ask me, being broad helps-it stops you sliding about in the seats, unlike those pencil necks