finding the part number for my 60 degree 150 Block. where is it?

SparkieBoat

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Aug 17, 2009
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The only number I can find on my block is 438419. it is on the drivers side of the block. I want to know if my block is a 91 or a later block. I am about to tear it down and just want to know exactly what I have. The number on the welsh plug is 34094131. there is no tag. I know the 91 block has some differences from the newer ones. It has heads from a 91 motor but they may or may not be the original heads for the block (head numbers are 0332544). thanks for the help.
Sparkie
 
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