I'm thinking about buying an '83 Callaway turbo 320is. Car has a lot of nice stuff including an engine with 60K miles on it. However the turbo has 160k on it and seller says it needs a new "cartridge" -- meaning the turbine, I suppose. Anybody have an idea of cost/complexity of replacement? Anybody have a unit to sell? Also, since I'm a stone age 2002 owner, what other maintenance issues might I look out for on that car -- timing chain (belt?) replacement, clutch work etc. Thanks in advance for your email or posts.