Fist off I am new here. I have a question about my safari I resently aquiered. It is a 89 377 single carb. when I boughtit I was told that it needed crank seals. what symptoms dose this problem usualy have? Mine is fludding like a #$%@&, and runs on one cyl untill the rpm's get up and as soon as it fires on the other plug it dies compleatly. If that the problem what are the costs? If they are too much I also have a 503 Blizzard engine to trans plant. would this be a direct swap or would i need to line up everything? Thanks and this is an awsome site.