$4000 is not going to be enough money to do this conversion :)
For everything from brakes diff upgrade suspension upgrade setting up your turbo gear fuel upgrades plus actually fitting the engine into the car(ie wiring mounts etc) $4000 wouldnt even get you the parts
And then engineering on top of that
Realistic figures if you can do a few things yourself like get the engine mounted in the car install gearbox tailshaft & diff yourself you would be looking at $9,000 - $15,000
If you want a drive in drive out situation i reckon $20,000 +
These arent small projects and for any restrictive budget, its better to just buy one already done
Me, i'm an idiot :D and attempting to do it but trying to do what i can myself to save cost
Have a think about what you want out of the car and then make an informed decision