cb1971

I have a 71 CS SX that has a replacement engine in it. It is supposed to be a 70 SX motor Does anyone know what these engine pad stampings mean?

Thanks

joe_padavano

They mean that someone other than the factory stamped them. That is not a VIN derivative. You'll have to ask whoever stamped it what they mean; it is not a standard block stamp format.

cb1971

Thanks

I was afraid of that.

classicmuscle442

Have a 455 engine stamped like yours, California car, was told it was a boat or industrial engine,

IMG 20140119 154043

Fun71

If it is a replacement engine then it's really no wonder the block stamping is not the same as what came from the factory. It's likely a stamping from an engine remanufacturer, which means the engine could be built with just about any parts, and not necessarily what would be found on your car originally. What heads are on it?

hurst68olds

someone explained & decoded an engine with that format stamping in the past year

from Oldsmobile: industrial / service / marine as mentioned above

cb1971

I have E heads.