Hello Everyone, For the past several years I have been searching for a "spare" engine block for my 1939 LZ sedan. I finally got lucky and found one nearby in Northern California. For $400.00 I got the block, intake manifold, wire loom, distributor, flywheel, crankshaft, camshaft and a few other minor parts. The block is in prefect condition with no rust and no visible cracks. The story I got from the seller of the block is that this block came from an estate sale of an avid car collector. This block had been stored in a vat of diesel for about 30 years so it was perfectly prevserved! The only bad part is that it looks grungy and smells like diesel. The other amazing thing is that the block has a stamp (see attached photos) that says: 96H BO40. I understand that 96H is a designation for 1939 model year. The block looks identical to the block in my '39. The cylinders in the block I bought are the pre-1940 diameter. Also there are very faint numbers on the bell housing. I am guessing that this block was rebuilt at the factory. If anyone knows anything about blocks that have a stamping such as this please let me know.