Does any know of a site where i can get a turbo kit for a small block chevy (383 cbi) I am puttin it in a 1989 mustang lx  

You won't find a "pre-made" or "pre-packaged" turbo kit for that kind of an engine swap, you will have to purchase a turbocharger and fabricate the rest yourself. This won't be an easy task if you ask me because you probably will even have to fab headers for the thing as this isn't exactly a common swap, but then again just putting a small block Chevy into a Mustang requires a lot of fabrication so maybe you're up to the task...  

There is alot of fab involved in building a turbo system. I am working on a 1990 chevy 1500 sport, single turbo blow through set up and used one of my single turbo headers that I build. There was some major madifications done just to get it to fit. We probably spent 4 hours on the crossover and downpipe and this was already with the header made. We looked at it with the long block in it and said it would be cake. Once we get going with it you see how much stuff is really in the way. Its together and we plan on firing it this week, but it took some fab. Anything is possible, its just a matter of if you have the patience and tools to do it