Ford Repair: mustang 1997 gt, blown head gasket, cracked head

Question
misfire code on cylinder 5.have done plugs and wires.white smoke from exhaust.runs rough.

Answer
hey there,
talking from experience this sounds like you have a blown head gasket and maby even a possible cracked head, i would take it somewhere to have a block leak test on this, the block leak tester will verify if there is any Hydrocarbons (unburnt fuel) going into the cooling system. this will verify a faulty head or head gasket,
good luck
Chris P