overhaul engine is a tedious task... only attempt it if u have all the knowledge and tools... if not, better send to workshop.... even at workshop, mechs need to take a few days to complete... its not that easy....
usuali no nid to waste money if ur engine stil ok.overhaul oni when makan minyak hitam n kluar asap putih. change valve seal and grind valve should be enuf. unless kena piston ring then oni u overhaul lo.not cheap leh.
I m going to sell my gtr 34, this car is full modified from HKS (Japan) come with original 699 hp, blue body colour with 18' TE37 , and all HKS stuff, twin big turbin. selling 3xx k (with ngo) . any one interested...