i got 350 in my 1981 Camaro and just working on 7 cyl so chek the compression and find out that the cyl number 3 got 0psi in it so i think it should be the valve is done so chek the other 7 cyl and they all have around 75-85 psi on all other one....so think my engine was done so got no money to put a other engine right now, i ride it like that for all summer about 5 month and did not burn any oil at all.....do you think my engine is done or just need new head?