K so i went to check out a car today and it's a 1983 Pontiac Trans-am. The exterior is a bit rough and the interior needs a few panels here and there but i have almost all of those parts laying around from my previous car. The thing that worries me is the motor. The guy swapped in a 350 from a truck and when he started it up we looked closely at the left manifold and noticed it was puffing a lot of blue. Does this mean its burning oil and the manifold gasket needs replacement or is it something more seurious? I kinda need to know this by tomorrow. It also seems like it has a noisy lifter. would this be the cause too? Any input would be great!