LEA is the 1953 Engine Serial Number prefix for a 235 engine installed in 6000 series truck.

The "over stamp" is possibly an indication that it is a replacement engine.

What is your title/registration vehicle ID?

http://www.1954advance-design.com/chev-specs/1953-Chevrolet-t-and-c-ser.pdf

Find and post the head & block casting codes (and date casting codes). This will confirm the pedigree of the engine.

Cheers

By the way, what bubbles do you make?

Tim
1954Advance-Design.com
1954 3106 Carryall Suburban
1954 3104 5-window pickup w/Hydra-Matic
The 216 and early 235 engines are not "splash oilers" -- this is a splash oiler.