I really hope you havent ordered this yet. Im assuming your looking for the least time possible because this is your primary vehicle and it cant be off the road long. With this kit I will tell you straight up it wont work and you will be off the road for a very long time if you try to make it work.
Dont waste your money on a no name / Chinese turbo. Many people have burnt up the bearings in the CHRA and exploded it or it leaked through the seals, smoked and killed the engine oil pressure instantly. There is a reason they start at 1000+ from any other manufacturer. If your looking for cheap and dont have the ability or space to do some fabrication yourself then your better off not attempting this at all or doing some research into what others have done and buying stock factory 3.8 turbo parts or better quality overtime as funds permit. This header looks like it would work but these thin SS Chinese headers are prone to cracking and leaking exhaust you need to build boost.
If your looking to do this on the cheap well thats not a big problem. You can use a turbo from just about anything (within reason) most have standard flange sizes, T25's are extremely small, T3 is your standard most common size for auto use or small bore applications, T4 being large turbos like you'd find on a big deisel or transport truck. Look into holset, they are used on dodge trucks, volvo engines and industrial diesel engines. For a 3.8 you would be looking at a mid sized T3 turbo or smaller T4 turbo something like a garrett GT35 - GT40 or holset HX35 - HX52
You can use your stock exhaust headers and have an exhaust shop bend exhaust pipes to your turbo and welded on a T3 / T4 flange. You could pick up stock
grand national turbo headers or risk a Chinese header.
Intercoolers are dirt cheap for a chinesse brand and pick up a universal intercooler kit and cut some pipes to make your own or you can take it to an exhaust shop and have them bend some exhaust pipes to make intercooler pipes.
You will also need a carb setup for blowthrough use you can buy them set up or have yours done cheaper. You can also use a blow box that covers the and pressurized the entire carb with boost. You will also need to have this tuned on a dyno or a wideband 02 senson will have to be installed in the car to tune it off a dyno.
This is a fair bit of work regardless of it being a bolt on or custom job but it doesnt have to be that expensive with some good planning. Best of luck