Casting numbers on farmall h head

47Farmallh

New User
Whats is the difference between the two casting numbres on the farmall H head. are they both the same compression or is one higher compresion. please help thanks

Matthew
 
There are two different gasoline heads. One uses valves with a length of 5 5/16 inches and the other uses valves that are 5 15/32 inches long. There are also two more, one for distilate and another for kerosene. That makes four different combustion chamber sizes.
 
There are two different gasoline heads. One uses valves with a length of 5 5/16 inches and the other uses valves that are 5 15/32 inches long. There are also two more, one for distilate and another for kerosene. That makes four different combustion chamber sizes.
 

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