I like the topper! That’ll be great fixed up.
LMC has a mount that would stand up the spare where you want it. Their part number 38-3196-F. (Man they need to do something about their website!)
I had a canopy (topper or cap) on my truck, one thing that happens is I want to keep it clean and then I don’t use it as a truck. It’s also hard now for me to get in under the canopy and do anything.
I like my big Weatherguard toolbox, my buddy looked at it and said good thing you have a long bed! So that would be tough if my spare wasn’t mounted below.
Edit, Steve’s idea on the Bronco swing away is a good one to consider.