Keith's website is back up.
GEA was a 1949 235 Engine Serial Number code.
GEA indicated 1949 235 installed in a 6702, or 6100, or 6400 series large truck.
I cannot find that block casting code.
Could the head casting code be 3836848? (there was no 3886848 head)
That would be a 56-62 235 head.
It would have a 4-screw valve cover.
Take off your valve cover and see if there are 4 screw holes for the newer style valve cover.
It is easy to change two rocker arms posts on a 4-screw head and then use the older style 2-post valve cover.
There was a dash oil pressure gauge for all 47-55 Chevrolet trucks (no matter what engine).
