turbocharger on ebay what do you think?

The turbo is one component of a turbo charged system. Looks like nothing else is included. You will need to fabricate all of the intake, exhaust, oil plumbing since it's not a kit. Also, your engine needs to be capable of supporting a turbo configuration. Things like compression ratio is key, not to mention you need to have a proper carb for turbo charged engine. You need to do a lot more research before dropping a dime in my opinion. Do a search on this forum and you will find some recent threads regarding turbo charging early stangs. 10Secondgoal will likely chime in and provide a lot of insight as he builds and installs turbo systems.

The first turbo, you would need two of them. It might be able to get close to 500 on a 4 cyl, but it would choke your motor about...3500 rpm or so ?
The second one is weird. A T-70 is usually good for around 800hp, but this one again is based on a T-3 flange. You wanna find something in the T-4 flange area and T-60 to a T-70. I would personally stay away. You can get quality cheap turbos shipped to you for about 600 bucks. It's a known company, and would work great on your car. The price is what scares me. There is still alot to buy. I would try to buy the the turbo last. That way the warranty doesn't go out when you are saving/building the kit.

It is listed as having a 49mm inducer on the compressor. As 10secgoal said, way to small for a single.