Sounds like a good chance at a great project. If it won't kill you in the $$$ department then go for it. Another shot like this may never come along.
I guess it depends on how much you think you will really use it all.
Take the emotion away, how does it fit into your life as you see it over the next several years? Does it make sense to start another project right after you finish this one? Maybe you can get the car together and sell it at a profit? Then again, you could have a huge pile of parts collecting dust, getting out dated and losing value......
Just some thoughts. Good luck either way you go.
