The terminology for this failure is indicated by the acronym STB. (Hint: the last two words are "the" and "bed".) This acronym is often expanded to FSTB to indicate finality to what has been done to said bed.
I yield the remainder of my time.

Carl

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