I just bought a '82 BKO, 351 with a carb.The guy told me that the head gaskit was bad and the rear main seal was bad for $500. I got a chance to look at it this wkend and when I checked the oil it smalls like gas and it looks like gas.It doesn't look like water and oil together. There is no oil in the radator eather. How can gas get in to the oil? Would it be a head gasket or a manifold gasket gone bad? Does anyone have any Ideas?