@neo207 See if this helps:
https://forum.recalbox.com/topic/22087/n64-lent-sur-pi4-recalbox-v7

Super neat stuff there, thanks.

I use the IP connection. If you mean how did I plan to deal with heat when I was building it, that's pretty simple. I mimicked an attic except I vented the air down around the outside of the lower jaw. so air comes in through the input/output holes, gets heated by the pi, and goes up into the upper part of the skull where it cool and falls around the outside of the lower part of the skull.

I figured if it didn't work out I could just use a fan, and I even have a fan installed in the box, but I never cut a vent hole for it because it doesn't seem like I need a fan and it's kind of loud so I just unplugged it.