![]() All the connecting rods were the same from 1948 through 1953 in US production. Camshafts had casting marks in a lot of cases. They had straight stem valves with standard keepers. The first few years of the 8BA family beginning in 1948 for pickups & trucks, most engines were the same with no obvious markings on the block (in US production). I have seen flatheads on which the date code appeared to be missing, although I suspect this is an artifact of time, rust, Also, I have heard, but never verified, that if Ford rebuilt an engine, they changed the date code to reflect the rebuild. Please remember that it is possible, even likely, that the year the engine was assembled will be the year before the car’s model year. I should credit Flathead Jack’s catalog as my first source for this information, although I have now seen it in several places. If you can’t, refer to one of the flathead books available or one of the other flathead web sites. G 20 B would be an engine manufactured on January 20, 1952.Īs for the other styles of blocks, most folks can identify the engine series if not the exact date of assembly. The number is the day, and the second letter is the last digit of the year. It consists of a series of a letter, a one or two digit number, and a second letter. You can see it with the intake manifold and heads still on the engine. ![]() It is visible with the cylinder heads and manifold on the engine.įlathead Date CodeOn late model flatheads without the bell housing cast into the block, there is a code stamped on the right rear corner of the intake gasket face of the block which will give you the manufacturing date of your flathead Ford or Mercury. On late model flatheads without the bell housing cast into the block (1949-1954), the number is located on the right-rear corner of the intake manifold gasket surface. ![]()
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