I have a 1980 nonturbo cd. Am going to put a turbo engine and trans in it, might go with manual, but most likely auto. The engine and auto trans will be from a 1985 300d.. Does anyone know the different rear ratios for these years, also have an 83 turbo parts car I could take the rear out of. Any input on these years differences would be appreciated. I have to pull whatever Im going to use in the next few days, as these parts cars have to dissappear very soon.