Yep std rebuild with GREYS, or blues(4wd cossie), some greens may be happy but will be worked hard, greys won't be troubled at all, and can still get ace emissions on a decently mapped ecu, mine is 0.97% CO idle and 100% perfect, note this is on greys, with almost idetical spec to yours, I can get 40mpg on a run, average around 27/ish, that's with 180,000+ on the bottom end, done top end/turbo.
tabetha