My 65 coupe spits out lots of antifreeze after I shut it off. As a result, the car doesn't have enough coolant in the system after a few months, and begins to overheat in traffic. Why wasn't this a problem back in the 60's on these cars? Is there supposed to be an overflow tank on these cars? If not, what are my options? I also don't have a fan shroud, but I believe this also wasnt stock. I want something that looks stock in appearance for my overflow container. Thanks for all your help.