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I can easily cross over the block/casting number but the serial numbers are not listed. The only real difference in small blocks is the bore and stroke and the number of main bearing bolts, if you plan to built up the engine you need a 4 bolt main cap engine block
The casting number for a small block chevy is located on the rear left side if the engine where the transmission bell housing would bolt to. Where did you find these numbers?
On the chevy small block v8 the numbers will be on the left side of the engine look for a small step right at the head / block mating area. The numbers will be in the form of a ser# get that number and call a good chevy dealer and they can tell what engine you got. But any small block chevy crate engine will be a 350 or a 305. they will act the same as far as tune up and any vacuum hoses to the carb or trans. They interchange of a sort.
if you have the engine out itheir is a vin num stamped on the rear of the heads ,olso if its a small block shuch as a 350 327 305 or even the 400 small block90% of the engine parts are enter changeable,
their shoulf also be a vin number stamped on the block right above the top bolt of the water pump on the drivers side
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