Just bought a '68 Mustang 289 2v coupe, what should I do first?

[bunskippy]

I'm new to muscle cars, but always loved these and a deal came along that was too good to pass up. Now I have this car and am wondering what to do first mechanically. It seems to run ok (low idle speed, I think -- it sometimes stalls out if I don't let it run for a while after startup). I'll do some interior work on it, but am wondering if I should take it to a Mustang mechanic shop somewhere -- but if so, what should I ask them to look at? I'm mostly interested in engine, tranny, etc. But i don't want to pay $400 for labor for someone to tell me "everything's ok" and leave it at that...
any advice or easy first project to tackle would be welcome. Also, anything to listen for or test to see how the car is responding would be great. Thanks for your advice!