I have a problem. I just bought my 1963 283 c-10 about a week ago. It has been running fine until the other day. I thought it was out of gas cause it just died. Got it towed to my house and filled it but it still won't start? It turns over fine and gas is getting to the carb good. Also it is firing fine. When you turn the key and pump the gas, it revs until the key is released? Any Ideas? Please Help!