I just took a few pics.
There is a right and left, or front and rear, however you look at it.
The bases are angled and one is short and one tall for engine angle hood alignment.
Mancini racing used to sell them.
I have a pair stashed somewhere. …(Not for sale) I will try to take a look tomorrow and post some pics. I can’t find them on their site right now. Maybe give them a call.