Try all the test mentioned above thay are all good proven test tried a few my self now and again,But if the car still runs hot IT's like 65CAYNE said their are a lot of things to consider.How many core's in radiater,wrong Torque Converter,Jets to Leen,Block Bored out to much/ water jaket to thin to run on street,that would't make it a boat anker just fill the block with some thing like MOROSO or Hard-Block filler,just run water through Heads.Don't no if it would be steetable never tried it.running NO'S you probably all ready have timing retarded that will help,post your test result.