Pros and cons of moving gas filler to the trunk

I always pump my own gas here in Kali, I’ve tried everything to prevent it from burping out including going slow it always spills if you don’t make a good seat with the pump handle it will not pump the gas.
I need to vent the tank better somehow or relocate it.
The car is going to paint in two weeks need to resolve before it goes

vent problem for sure -------------