[ZOERA-SC7XX]

If you can get by with a somewhat mild 390, and build and paint the car yourself, you might build a nice ERA for under 50k. ERA is arguably the most accurate looking Cobra and is built using many components that interchange with an original. The chassis is ERA's own, and in my opinion, is superior to the round tube original; and the car drives as good or better than any factory built car (no shaking, no rattling, no vibration). The people at ERA will help to no end getting your car together. Just tell Peter your situation and he'll work with you. I've seen FFR and BDR Cobras that cost just as much or more. It depends on how much YOU can do yourself.
I'm not saying ERA is best for you. Many of the others mentioned here are truely beautiful cars. Only you can decide where your money will go. I will add that if you want a show/track car, you WILL spend quite a bit more.