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Here is a pic of how the car sits now. My driveway is sloped so I measured from the ground to the top of the wheel arch, 25".
section 32-250 of the 123 manual list the springs and technical data.
The TD springs should be 115 324 38 04 unloaded length of 361mm and rate of 18.7mm per 1000 newtons.
My '79 300D donor has 115 324 34 04 springs 369mm unloaded and a rate of 18.8
So swapping the springs will give me 8mm extra height but very slightly softer springs././ not worth the trouble to swap them out.
The longest rear springs listed are 116 324 09 04 at 372.5mm and a rate of 15.2 so IF I could find them I'd get a harder ride and a real benefit of maybe 1" height, (11mm+ net ^ in rate)
The issue with the engine is unknown, besides a worn turbo, it has near zero compression, won't start, and all vapors come out of the breather. The PO said he ran it hot due to a leaking hose (the short water pump hose) and the donated it to the Kidney foundation. He said it still ran at that point. When I got it there was maybe 1 liter of oil in it and very little coolant....
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