What happened to the stock turbo? If you are looking at it as a way to bump up an n/a to make a 3sgte engine on a budget it would work well but not sure about substituting for the 3sgte's turbo, It would not perform hugly different from stock imo. They are cheap and plentyful though. I did read one post on the celica forums about some guy using a 14b at 14psi but no numbers or anything it was just what he said he was running. Also remember the 14b is not that great above 16psi.
I am about to adapt a turbo onto my gen 2 3sge and run it at ~8psi to get some more hp. All depends on your goals I want a quick spooling turbo for the type of racing I use the car for. If you are sure you want to fit it just make an adapter between the two different manifold patterns and fit it on and do the piping (easy to say
). You will also need the dump pipe and a way to fit that to an exhaust system.
Check out the link PHOENIX posted to learn a little about how the turbo system works, there is a lot more to turbos than those that claim things like "bigger is better" and "more boost = more horsepower" those statements are not true for most applications and you need to know what you want before you decide to fit a turbo to an engine.