I have a 351c in my car I have stong spark (at the plugs) and gas but it wont start. The car has been sitting for around a year would the gas have gone bad? Could this be the reason it wont start? I have checked the firing order and replaced the cap, rotor, plugs, plugwires, and coil. I dont know where to look next but the gas. The timing is correct but it wont even try to fire, even with starting fluid it wont catch.