Distributor boss serial number: AGEA2845
GEA is a 1949 truck engine serial number prefix.
I do not know what the leading "A" refers to?

2845-1000 = 1845th 235 engine out of the Flint MI engine plant that model year

Block Casting #: 3835309
1948-1949 235 (low pressure 235 with two bolt valve cover?)

Is there an Engine Serial Number stamped into the flat-ledge in block to the rear of the distributor?

Find and post the head/block casting codes & date casting codes