..sounds like you're arriving onn the scene at precisely the right time!
www.newportshelbycobras.com has an ad in the November R & T (p. 162) shows a "Fully assembled, painted roller, less drivetrain" for $42,500! A BUNCH of people on this site can connect you with the right builder, engine, clutch and tranny for this car. I am willing to bet that you can be driving your CSX 4000 427 for less than $65K---a lot different than Shelby's selling price a few years back!!! Good luck.