Yeah, the chrome got worse over the years, unfortunately. I don't think they're worth very much - if you were in California I'd be very very tempted.
a couple of months back I was at a swap meet on Long Island and at the end of the day there was a guy throwing away a box of motorcycle parts. I took the parts off his hands for nothing figuring there has to be something I can use. The parts turn out to be for a 1969 JAWA 350 california and I got a tank with petcock, fenders, carb, engine side covers, and all the internal electrics in really good shape. Originally I was going to use the tank for a chopper project and the sidecovers I was going to hand on the wall, but now I have enough pieces to make this new bike a runner.
If nobody wants her I may try to build a vintage flat tracker but keep her street legal. The bike is so good looking stock I may keep her that way too. A long time ago I was at a show in suffolk county long island and there was a guy there with a 1940's JAWA 250 Perak (sp) (the really art deco JAWA) that he put a cb350 motor into. The bike ran like gang busters and looked cool to boot - he did it because engine spares for the bike were scarce at the time.
The california frame has a single downtube like a cb350, but I think the cb350 motor is too tall for the bike (it roughly the same size as a superhawk and even the 350 two stroke looks cramped). I have a ton of spare T500 parts so if I go the vintage tracker route I will definatly put a T500 motor in it (the stock 350 is slow anyway). I'd love to put an RD350 motor in it if I could find one cheap.