search lower intake manifold. may be the lim gasket.
hes got the V8.
make sure your checking the level when the car is ice cold, like after being parked all night. the res level changes as the engine heats and cools. the rad takes and puts it back as needed.
98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW