It can be done but the outcome will depend on your skill level. Bubble gum welds are a no no, especially on the inside of the pipes. I would invest in 6 months of research before I started.
Phunk has a do it yourself TT parts. I would say use his intercooler and tubular exhaust manifolds. Turbo's can be had. I have a set of brand new se Fast Intentions stage 2 turbo's for sale that will fit his vband tubular exhaust manifold or you can buy your own Garrett's.
https://cj-motorsports.com/t/370z