I put a brand new N1 oil pump on mine when i put it in, shattered it in less than a week. Buy a good oil pump, luckly i just happened to be watching my oil pressure and had my ems setup to kill the the engine with oil pressure loss. Other than that, just do a timing belt, water pump (stock,not n1), idler pulley, tensioner. I put a new lower timing belt gear on mine, but thats kinda up to you i guess. Make sure you have a good oil pan and pickup setup.