3835913 = 54/55 head

LAA694917
L = 1953
A = 235
A = regular engine
http://chevy.oldcarmanualproject.com/models/engine.htm#53eng


X53LOO9223 = 1953
X = 6500
53 = 1953
L = Los Angeles
http://chevy.oldcarmanualproject.com/models/series4.htm#53series

An 2-qt oil filter was optional and was usually mounted ion the intake manifold (but any location is possible and non-GM filters were available). (RPO 237K)

A PCV set-up was optional on 1953 6500s (RPO 217E)