I've got a built 308 but i have a problem. I am not sure what the firing order of my motor, or cam is. I cannot determine if it is the H.O or non H.O order. What is the easiest way to determine this i.e valves, etc. I believe it is hyd. lifters because the valves, unless they are opening, are pretty lose and i can push the pushrod down a bit. Is this normal, i need help, any kind.