Twin turbskies!!

Anybody out here on the ol forum know what it'll take to run some mild boost action??
318 la mopar, 1983, completely stock except an intake and fitech efi combo(I know current setup is absolutely garbage for hp) but, would would yall do to make this thing hit 600whp?? Thinking heads,cam,new rods, pistons and maybe 15 or 17psi. Definitely lmk if this is unrealistic bc I can get my hands on a 6.2 ls for 1500 bucks...but the control pack and tuning software would be an additional idk maybe 2grand.