Hello, Kaiser-Frazer did not use a chassis number. On some of the models, they stamped the serial number near the right front shock tower (on some cars, it might be on the left front). If you don't find it, don't worry as not all frames were stamped with the serial number.
The engine number should be stamped onto a tag that is on the driver's side of the engine, just behind the oil filler tube. If the tag is missing, on some cars, it's stamped into the block on the driver's side, just behind the water pump and just below where the cylinder head mounts. The number, if present will probably be hard to read because it was not very well stamped.
Any number you find cast into the engine is either a foundry casting date/time, or a factory part number. None of them were used as the engine number. And, the engine number never matched the car serial number since the serial numbers started new with each model year but engine numbers did not.
