Sure, those flight controllers will work but it will be a challenge to package a full size Pixhawk on this vehicle. It’s unrealistic to avoid soldering in this hobby. Plan on buying a soldering iron, shrink tube in various sizes and a multimeter at a minimum.
The vehicle is a stock Gen7. I added 2 mounting platforms for components that are assembled to the frame with brackets and screws. This required re-mounting the ESC but this was trivial. It’s a Pixracer flight controller which I have a few of. You will need to replace the RC system as you will need more channels than it provides. I use Frsky gear with an X9D Transmitter and in this vehicle a R9 Slim Rx which is their 900Mhz longe range line. The GPS module is a Here GNSS but you can use what you like. There is a power module installed also to power the FC and peripherals and provide voltage and current data. I’m using an ESP8266 telemetry radio which I use on most craft. You can use the 433/915Mhz telemetry radios if you like they work well.
For reference this photo shows a full size Pixhawk sitting on top of the current setup. You could get it in there but it would be tight. You definitely need easy acess to the spur gear as I have replaced a couple of those from stripped gears when the vehicle has hit something on an auto mission and chewed away on the ground until it auto disarmed.