hello all , i was "told" that my car has gt 40 iron heads in hte car when i purchased it...how can i be sure? i searched around and i thought i read that there should be three vertical lines somewhere if thats true wherre would they be? the heads were painted blue, i guess when the engine was out he painted everything but i can only see a 22 on the top right(looking from front of car) please let me know if there is any other way...thanks