For those of you that are considering this to be the cheapest way to bigger horsepower... Think again...
Turbos have always been and will always be the easiest/cheapest way to break 400whp. Remember that there was significant fab work in this setup (exhaust, blower adapters, 8rib, etc), and race gas to achieve what turbo setups do without effort on 93 octane. If you want to try to argue about anything about the turbo being harder or more expensive, go for it, but it will not get you anywhere as there is no 'TVS package" offered by a vendor to compare to the vendor offered turbo kits (because it would be retarded for them to offer one).
If you got a used turbo ($150), and put together your kit (easier and cheaper than headers/adapter plate, but lets assume its equal), you could have an un intercooled turbo on your car for ~$1000 less than a used TVS. Putting a intercooler on your turbo setup is as cheap and easy as a trip to ebay is, vs trying to get a mess of parts to put one under a blower.