i recently did a few mods on my a14 which include a 290 duration 11.5mm lift camshaft, twin hitachi su carbs, 7kg flywheel, h75 head with 2mm taken off and ports flown & match ported to su manifold. i can't seem to get the rockers to stop making a noise, while driving and idling you can hear them inside the cab very clearly. i checked the oil pressure and it's all good. any ideas to this problem? the gap is set to 0.35 according to the nissan specs