Putting $2500 into a car that when I'm done with it will be worth maybe 6k-7k makes sense. There is nothing wrong with the head on my car and since I watch the gauges like a hawk it will never overheat. Also as another poster said and I find this to be true the resale on 350SDL's is extremly high. They seem to run in the 10k-12k range. While a comparable 560/420SEL are in the 7k-9k range. That will buy a lot of gas. However I am not bashing the 350 one will probably be my next car.

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2016 Corvette Stingray 2LT
1969 280SE
2023 Ram 1500
2007 Tiara 3200