Welcome to the forum.
You need a lot more help than we can give you, if you don't even know what to do with the carbs... do you know the difference between a 'huffer' and a 'puffer' and do you know which yours is? If not, then it might be good for you to do a google search on turbo basics and read some technical info about them - the types, installation techniques and tuning - which, yes, can be tricky. I did this when I bought a turbo VW powered sand rail, just so I would understand what it was I had and how to keep it running well... it was a good education. Google rules!
Also, there are several posts here in the forum about turbo 660's. I suggest you use the 'search' function to find them, read them, and perhaps contact the posters about any additional information they might be able to provide.
With luck, some of the turbo guys might see this post and respond.