[sammyg2]

For the do it yourselfer, turbos are actually easier and cheaper.
Case4 in point: how many "good" superchargers can you find in the junkyard that are sized correctly for the 914 engine?

Used turbos are available for about $100 each. The material for the piping is real chap, and if you can weld, not all that hard to put together.
I'm not saying there is anything wrong with superchargers, I was running a mooneyham blower long before I new how to spell turbo. They are just easier and cheaper, imo.