Re: lantana you wanted a key start!!
This one is a centrifigal supercharger which is basically a belt driven turbo. I had considered this type of boosting and had pretty much ruled it out. One of the problems with boosting a n/a engine is compression that limits the amount boost as well as the heat of the charged air. superchargers really heat the air. One thing nice about a rear mount turbo is the charge is much cooler by the time it gets to the engine. Adding an intercooler isn't usually even needed in a rear turbo. A cooler charge allows more boost and HP. A rear mount turbo probably has the greatest HP potential and may be the cheapest way to go as well.
Another option is HPS generation 1 or 2 superchargers. They are nice units but their reputation is not so good right now and people are selling them cheap. From what I have been able to read the supercharger are fine but tuning is not. HPS uses a rising rate fuel pump to keep the engine from leaning out but guys have blown a few engines and dumping the kits cheap. I am tempted to buy one of those units and tune it properly. The rear mount turbo and the tuning approach that Rudy and I have in mind would be applicable to any n/a V6 as well and would be very cost effective.