i have a 230 rwkw RB20 mate and its been going over a year now of hard driving, plus i have seen another half doz with more than 200 rwkw and all are fine.
who cares if the motor is more than 10 years old, its how many km's its done that counts, if its geting up there in km's, a quick freshen up might be in order,
im going for 250 rwkw in a few weeks so ill see where the week points are.