I've made some progress for the Chevelle too. New Belt Pullies are from my parts box, alternator too and new engine drive belt is made from paper. I also fabricated alternator bracket out of beer can aluminium. Then I built Turbo Wastegates. They are not so great as they could be, but just enough for me: They can't be seen well from finished build, only little part of them will be visible.
I have built some chassis too, no pics yet but I can say that rear axle is almost there. Only thing I need to do for it, is little narrowing, since now tires don't fit nicely inside rear fenders, but when I take few millimeters off from the rear axle, everything will be all right, I guess. Of course I don't know what needs to be done for the front end...