pablos49,

Would you be willing and able to post here or mail to me a few pictures of the 1949 firewall that distinguishes it from 1950 and later trucks? I would like to add this to a list of distinguishing features for A-D Chevrolet trucks (and I will reference your assistance).

That change was supposedly made in late 1948 on GMC cabs. Here is a photo made by Rob English for GMCs:

Change in GMC firewall in late 1948

Tim

lederman@siena.edu