According to the AIM (U17 A3), the oil line fitting for an L35 that goes into the block utilizes item 6 (Bushing p/n 444030) and item 5 (Elbow p/n 444052). I've determined that the "Bushing" is nothing more than a reducing union and the part of this union that screws into the block is 3/8" NPT.
I ordered the Elbow from HBC and while I can't say I'm surprised (

), the end of the Elbow has been machined for 3/8" NPT threads. While functionally this would work just fine and would clearly eliminate the need for the Union (Bushing), technically it's not correct unless the Bushing is a 3/8" to 3/8" Union which would make absolutely no sense. It seems that ALL of the Camaro parts suppliers offer the same "incorrect" fitting. Since my goal is to restore this car exactly the way it was originally built, I'd rather not eliminate the Bushing.
So, my question is, does anyone know what size either the Bushing or the Elbow is suppose to be? I could easily have the end of the Elbow machined down to the correct size if I know what size it should be. Hopefully someone has already gone down this path before me and could provide a little bit of insight.
BTW...this is for a '68 just for reference.
Thanks!
Bob