I bought a 1966 230SL two years ago that just had a 280 engine put in it. I am not mechanical, and it did not bother me. I rather looked forward to the more powerful engine. The previous owner had his mechanic put in the 280 engine, and he did not do a good job, although the engine was in fine shape I am told. Anyway, after several trips to a mechanic, the car seems to run great. I am a little bothered that it is not original, but I love the power and responsiveness. Also, I like the color (white on red)so much that I really do not have the desire to start over. I like the car to look good, and to run well. I am not interested in entering car shows. It probably does hurt the value, but I still like the looks and ride.
Holden 66
230SL 1966 USA