I made over 600 HP with my 1997 turbo Diesel back in 2001. Basically, what I did was to use a 215 HP injection pump with my #0 torque plate, camshaft and large injectors (then, the cam and injectors were from Diesel Dynamics; today I would use Dynomite Diesel Performance injectors). I used a big turbocharger, ported head and 3-piece exhaust manifold. Today I would probably use compound turbos from BD Power. Your 160 HP injection pump won't provide enough fuel for 600 HP.