Thank you very much, Stuart, that helps me very much. Jim Carter Classic Truck Parts believes they have the correct oil line whereas EGGE, Chevys of the 40s, and The Filling Station do not (due to their supplier building them incorrectly, so they say). I have one on order and the links you posted will be of great help. I believe what I have is the second one. The engine block number begins with HAA which, according to one website is a 1950 engine. The truck is a 1949 Chevy 4400. The enigne is a 235 and of this I am certain. I don't know that it is the original engine, but I am the second owner and the first owner says it is. If some of the 1950 engine blocks were cast in late 1949, then it could be the original engine or the website that identifies the HAA prefix as 1950 could be wrong.

Harrell Sellers
Brookings, SD