Good work, Jim

LAS394655 can be decoded by using info at a link I posted above. It is an extensive technical write-up by GM regarding 1953 Chevrolet vehicle codes.

L = 1953
A = 235
S = installed with a Powerglide transmission

You are doing exceptionally well. Slow and thorough and careful.

http://www.1954advance-design.com/chev-specs/1953-Chevrolet-t-and-c-ser.pdf
http://www.1954advance-design.com/Stovebolt-engine/casting-numbers.html