I offer a drop in, dual intank pump kit. They have proven very reliable & easy to install.
There is no easy way to add a Walbro 255 pump as the factory pump is pulse width modulated. This will not work well with a standard pump.
The fuel transfer function is rather complex & does not typically function if the bucket is modified. Also due to the effort required to drop the tank, you will only want to do it once.
I also have a triple setup for power ranges from 800-1500rwhp.
If I can interest you in kit, please give me a call.