Quote Originally Posted by Papee View Post
I used a metal one on apps boat. I put a grommet in then filled the gap with a hot glue gun.
That's exactly my plan. I got one of the narrower boxes, and the ECU just fits in it. I'll use some pieces of sleeping pad foam to cushion it, and fill the gap with hot melt.
Thanks to everyone for the ideas.

I'll try to update my progress with this engine overhaul as things progress.