I have a 63 Grand Prix with 389, tri-power. The center carb was rebuilt by a Pontiac expert 5 yrs ago. It ran perfect for the five yrs. I started it a couple days ago and it ran terrible with blue smoke coming from the tail pipes and wont idle. The fuel pump is about 15 yrs old that I put on at the start of restoration. Is it possible the fuel pump is bad and sucking oil from the block and into the carb. I am 84 yrs old and never saw a problem like this. Thanks for the replies.