Welcome Jamie -
And as others say - don't worry about fitting - you will - especially if you 'tailor' the car a bit...
Whenever I used to get out of the GTD40 at a hill climb - for the first few years - Marshalls would come over and ask "how the hell do you fit into it??".... and this was before I put on another 60-70lbs... My last event at the end of 2006, saw me at 340lbs+ and still I fitted - although it was a bit of a squeeze (mainly into my racesuit)...
I am now on my way down, (-120lbs and counting) so things should be a little easier now.
So size is not an issue - and if you fit your Cobra, you'll fit a 40... (unless of course your 7ft6 tall
