I have an RB, so it's lighter (100kg with my help) and has a close ratio gearbox as standard. Those two facts make my car faster than it should be for the power it has.
On a very good car, you could just turn the boost up to 1bar with no supporting mods and it would be ok. DO NOT TRY THIS AT HOME. In reality, a fuel pump, colder plugs, uprated clutch, filter, exhaust, front mount optional and have the fuelling&ignition checked are all highly recommended to save blowing your engine.
In my case it was done with just the filter, exhaust, front mount and dawes device. I ran it on standard plugs and standard fuel pump and standard clutch for quite a while. I changed the plugs and fuel pump to be on the safe side and I eventually killed the standard clutch after 3.5years of my abuse.
The do 5.1 to 60 as standard, so making them faster isn't hard.
My car is good to about 70some due to the gearing, then it's similar to the standard box's 3&4th when I'm in 4&5th, so I don't have the advantage anymore. I realy need cams with max power at 7500rpm to make the most of my box.