What adapter is used to screw into a big block to use the oil pressure switch that works the idiot lights in the dash? This is not for a pressure gauge that is in a console.
2 or 4 bolt block?
I presume you are referring to the "Elbow".....there are two listed in the parts manual.
1. #3954219 - 1969/396 325hp or 350hp (There was a note on the Aim that there was another part number used earlier and the number for it was #444052)
2. #3954220 - 1969/396 375hp
Here is a link that shows the elbow #3954219.......http://www.yenko.net/ubbthreads/ubbthreads.php/topics/581053/big-block-oil-fitting-brass-el (http://www.yenko.net/ubbthreads/ubbthreads.php/topics/581053/big-block-oil-fitting-brass-el)
Thanks. That is exactly what I was looking for.