E85 question about filter and Percy's Adjust a Jet

Its -10AN from the tank to the carb, -6AN to the carb and then -10AN back to the tank. The pump i'm using will flow 900lbs/hr at 8psi. I wanted to make sure that the return line will handle the surge after I get my hoof off the pedal.

I could have went with a 8, but from what I have read your suppose to run a large return line if you can.