Why do you want 600 out of it?
600hp or 600rwkw?
You want to do it cheap?
Or spend the cash to get reliable performance?
Are you going to use it for street or drag?
Which model do you want to start with?
(Yes it makes a bit difference)
whats your budget?
Starting with a figure in mind is a bad step straight off the back. If you want to buy a turbo falcon, how about get the car first, find a reputable workshop who specialises in FXRT6, ask them their opinion on how they think it’s best to get to your goal.
As at the end of the day you won’t be able to tune it yourself so you’ll need a workshop anyway and to be fair most people don’t have the skills or the tools to modify the things themselves either.
Until then, go have a look at build threads and it will give you an idea of how to achieve your goals. There’s so much info on here, search for it, don’t be lazy and ask a question with no actual information and expect to be handed that answer.
#dreamer