If that is the only PSU you have access to, I'd advise on not bringing it anywhere close to the system you've listed in the body of the thread. Why? It's a firecracker and will take out your entire investment inside the chassis. Where are you located, what is your budget, what is your preferred site for purchase? We'll need that info to help source a reliably built unit for the system,in spite of being an old platform.
FYI, you already have a thread
here that has given you a good advice, thus far.