I recieved a 68 vette as a gift from my father in law, it''s a 427 big block, 4-speed. it was running fine but seldomly used. when i recieved it , it sat outside with a cover but outside. with all of this rain i think it might have gotten moist under the hood. the other day i tried to start it and when i did it would stall when i gave it gas, i changed the in line fuel filter today,checked the cap and points but all it will do is turn over. i need help!