1973-1974 B body MOPAR coolant overflow tank #3673808 Shipping from: Pittsburgh, PA 15236 Price: $50 Payment Methods Accepted: PayPal or money order 1973-1974 B body MOPAR coolant overflow tank. Casting #3673808 molded in the tank. Small crack above the 2-1/2 quart line (see pic). I filled the tank with water at the 2-1/2 quart line and did not observe any leaks below that line although I can’t guarantee it. No cap or mounting hardware. This part is not being reproduced and is very hard to find. Doesn’t look the greatest and needs to be cleaned but is a factory MOPAR part. If you like patina and you need a functioning factory part this part is for you. Shipping extra. PM me if interested or if you have any questions. Thanks.