Is that an extra small hole in the back of the case behind where the amp gauge is inserted?
After looking at more examples the small "extra" hole would be for the oil pressure tube. But don't see that hole on originals though don't have allot of those pictures. Anyone see this or is this a case again of a reproducer "improving" the original
Kyle you didn't happen to reverse the picture you posted of the housing did you?
Maybe I'm turned around looking at all the pictures but if that hole was meant for the oil pressure hose on the OP's housing doesn't that put that gauge on the opposite side? Not sure if we should continue here or start a new thread
OP's housing is at the top of both of the following
*NOTE: the example in the picture below on the bottom has a large hole in the center of the bracket that appears to have been made after the part was painted. Not sure if this is a feature of an original or added by a prior owner/builder
Interesting shot below (still opposite from the OP's picture) and it may be just the angle but here is a side shot showing the oil pressure line going to the drivers side gauge pod but appears its going through of the housing. In the picture above (bottom one) shows that one with the oil pressure hose routed through the square housing opening. Two version? Owner alteration? This should get some additional comments