What are you going to do with the car?
In my opinion unless you are going to race the car it is unnecessary, expensive, takes moderate fabrication, and the kit weighs 95 lbs, which probably isnt much lighter than leafs.. do you know how to set it up/tune it?
It is cool, but are you sure there is not something else to spend the money on? Fuel injection, stroker kit, race block, heads, etc....