have a 87 gn, 57,000 miles. blew a head gasket. decided it was time to start mods. 3,000 non lock up converter, walbro hot wire fuel pump. lt1 valve springs,50 lb injectors, te60 turbo, precision front mount, prcision 50lb street chip.atr single shot, 9 in k&n, double roller timing chain, high...