You need a r5 gtt fuel pump, or bmw e30 external fuel pump. A r5 gtt fuel pressure regulator or a malpassi turbo carburettor regulator set at 4psi. You'll also need 8mm fuel pipes to and from the fuel tank.... or run a swirl pot system. You'll also have to retard your timing, work out where you are going to fit the turbo and look at the intercooler and pipe positioning. Also, where you are going to take the turbo oil feed from and make an oil return to the sump. The carburettor itself is the easy bit. Once it supplied with fuel at the correct pressure ( boost + 4psi) it does it all for you.