Sorry, and thanks, Grigg

47-53 31XX had the rear transmission support

1954/51st 31XX Hydra-Matic had a different style rear transmission support
No other size trucks in 47-55st had a rear transmission support.

http://chevy.oldcarmanualproject.com/parts/1929_54/258.htm

Tim
1954Advance-Design.com
1954 3106 Carryall Suburban
1954 3104 5-window pickup w/Hydra-Matic
The 216 and early 235 engines are not "splash oilers" -- this is a splash oiler.