OK, don't laugh, but get a packet of hot sauce from Taco Bell and squirt it inside of the brass fitting, then rinse it off after 5-10 minutes . If it is just caked with tarnish deposits, the hot sauce should clean it off just like it works on copper pennies.

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission