If your car is running with a striped out that means you dont need much power, simple bolt on mods on a standard engine will get you 11s. I would be more focused on the suspension setup and tire choice, a 300 to 350kw engine will do it easy.
List:
-Standard engine with metal head gasket 1.2mm
-FMIC bout 100mm thick
-Good piping kit
-Power FC D Jetro
-600cc Injectors
-Bigger turbo's N1 equivlent
-HKS Dump pipes
-70mm front pipe
-4 or 5" high flow cat
-3.5"catback
-Quality boost controller running bout 1.2 - 1.3bar
-HKS Drag Coilovers and run 0 camber
-Twin plate clutch
-Nismo fuel pump
-N1 oil pump
If you have most of them parts then the build shouldnt cost to much.