kelvin,

A low pressure 235 would have been common in a COE but I am not sure if it was standard in 1948. If no one posts that information, I check it out when I get home.
______

added later:

A 235 was most likely standard.
http://chevy.oldcarmanualproject.com/chevyresto/4886.htm

Last edited by tclederman; 02/04/2010 11:57 PM. Reason: went to Keith Hardy's site for 1948 information