Provided we're talking about a 216 I6 engine, which I assume we are because your block casting number matches a 216 I6..

1187822 to 1915446 corresponds to a 1938 engine.

So a 1577549 (thats a ONE not an 'eye') would fit in the '38 range according to the inliners.org website


an idea is only stupid if you think about it rationally.