Dont use a fuse tap under the hood.. It just causes issues and if your anyone who remotely uses your truck as a truck offroad, you'll quickly see what I mean.
Ideally, a Citizens band Radio (CB), any HAM radio, Scanners [whether police or weather], you could wire into existing power inside the vehicle. However, to minimize or eliminate any backfeeding, voltage drops, or interference, it is best to go straight to the battery for both power and ground.
What I would suggest is this. If you think you may be running a few new vehicle features. Consider picking up a Blue Sea fuse box, run a dedicated power and ground wire to it. You could still be direct to the battery by adding a 2nd ring terminal to the power and ground leads and add your separate fuse there.. Meanwhile you also have provided a second source for adding additional features and options.
I did a writeup/install of a HAM radio in a fellow overlanders vehicle on here;
Kenwood TM-D1710G H.A.M radio install.. PHOTO INTENSE
If you decide to go that route, hit me up and I'll forward you my contact info to walk you through more.
Also, is that an older Analog Uniden/Bearcat Scanner? If you live in a more rural area it may still work some but most everyone in Metropolitan areas are using digital systems and a bit more expensive and harder to get radio signal.