10066036...350...........2 or 4...Target Master/Goodwrench crate motor, 2-piece rear seal "hecho en mexico"
That`s why it don`t decode. However, I don`t know they used other casting dates, the classic date code other than stamped on the head deck would be like this example: A 5 4 A = January 5 = 5th 4 = 1984.
This is usually found on the back of the block by the bellhousing.
This is a common small block replacement engine, it uses the same parts as the traditional pre 1986 small block chevy`s, as 1986 was the year chevy went to a 1 piece rear seal.