I have a friend whos son has a Mustang and they are pullin it apart to make sure everything is kosher. I have a head question. he said after removing the intake and inspecting the heads everywhere he cannot find no signs of what kind of heads they are. they are aluminum and all he can notice is by using 2 mirrors up under where the intake would mount between cyl 3&4 and on the other side between cyl 5&6 there is the number 9035. besides that he said there is 2 header bolt holes on each side of the port, so each exhaust port has 4 holes. Can anyone give an idea to what heads these might be?