I’ve just refreshed my 91 lx 302. I have the engine back in the car and am in the process of hooking everything back up. I don’t remember what this is. Any help would be greatly appreciated.
Right off the bat, to answer your question, it's a support bracket for the upper intake manifold plenum. Here's where it mounts on the lower, it should be evident where it goes on the upper.
So what else have you done to the car? Start a thread in the Fox section to document your progress and ask any other questions, we love to follow along! And for all things that are good in the world, don't forget to post pics! We absolutely love pics! Just ask anyone, they'll tell you....